chembox verifiedrevid 401991969 ImageFile Diethylzinc structure.svg ImageSize ImageFile1 Diethylzinc 3D balls.png IUPACName diethylzinc OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 10413128 InChI 1 2C2H5.Zn c2 1 2 h2 1H2,2H3 rC4H10Zn c1 3 5 4 2 h3 4H2,1 2H3 InChIKey HQWPLXHWEZZGKY GFXTWEBUAS StdInChI Ref stdinchicite correct chemspider StdInChI 1S 2C2H5.Zn c2 1 2 h2 1H2,2H3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey HQWPLXHWEZZGKY UHFFFAOYSA N CASNo Ref cascite correct CAS CASNo 557 20 0 PubChem SMILES CC Zn CC Section2 Chembox Properties Formula C sub 2 sub H sub 5 sub sub 2 sub Zn MolarMass 123.50 g mol Appearance Density ... EUClass Flammable F Corrosive C Dangerous for the environment N MainHazards FlashPt Autoignition Diethylzinc ... cv2p0184 ref Reactions Diethylzinc is used in organic synthesis as a source of the ethyl synthon ... for ignition. Diethylzinc was also investigated for a time by the United States Library of Congress ... involved placing books within a vacuum chamber and exposing them to diethylzinc vapour. In theory ... deacidification process involving diethylzinc would require the transport by truck of enormous volumes ... prototype suffered damage in a series of explosions from contact between trace amounts of diethylzinc ... ref In microelectronics, diethylzinc is used as a Doping semiconductor doping agent . Fact date December 2007 Safety Diethylzinc reacts violently with water and easily pyrophoric ignites upon contact ... links Demonstration of the ignition of Diethylzinc in air http www.test tube.org.uk videos pages periodic outtakes3.htm Video University of Nottingham Diethylzinc, 15 wt. solution in hexane https fscimage.fishersci.com msds 46190.htm MSDS commercial supplier Diethylzinc purum http www.sigmaaldrich.com catalog search ProductDetail ALDRICH 256781 MSDS commercial supplier Diethylzinc http www.epichem.com metalorganics products zn dieth.html MSDS commercial supplier Diethylzinc http gw.akzonobel ... more details
Iodomethylzinc iodide is the active reagent in the Simmons Smith reaction . ref name smith For example, iodomethylzinc iodide, formed in situ from diiodomethane and a zinc copper couple reacts with cyclohexene to give norcarane bicyclo 4.1.0 heptane . ref name smith OrgSynth author Smith, R. D. Simmons, H. E. title Norcarane collvol 5 collvolpages 855 prep cv5p0855 ref Image Simmons Smith cyclohexene to bicyclo 4.1.0 heptane.svg center 300px An example of the Simmons Smith reaction Iodomethylzinc iodide may also be generated by the reaction of diazomethane with zinc iodide , or by the reaction of methylene iodide with diethylzinc . ref name smith References Reflist Category Iodides Category Organozinc compounds ... more details
Orphan date December 2010 globalize USA date December 2010 Expand list date December 2010 A highly hazardous chemical is a substance classified by the United States America n Occupational Safety and Health Administration as material that is both toxic and reactive and whose potential for human injury is high if released. Highly hazardous chemicals may cause cancer, birth defects, induce genetic damage, cause miscarriage, injury and death from relatively small exposures. Highly hazardous chemicals include Acrolein Acryloyl chloride Allyl chloride Ammonia Ammonium permanganate Ammonium perchlorate Arsine Benzoyl peroxide Bis chloromethyl ether Boron trifluoride Boron trichloride Bromine Bromine monochloride Bromine pentafluoride Bromine trifluoride Tert Butyl hydroperoxide Carbonyl fluoride Chlorine Chlorine pentafluoride Chlorine trifluoride Chlorine dioxide Chloromethyl methyl ether Chloropicrin Cumene hydroperoxide Cyanogen Cyanogen chloride Cyanuric fluoride Diazomethane Diborane Dichlorosilane Diethylaluminium chloride Diethylzinc Nitrocellulose Phosgene External links http www.osha.gov pls oshaweb owadisp.show document?p id 9761&p table standards OSHA list of highly hazardous chemicals DEFAULTSORT Highly Hazardous Chemical Category Occupational Safety and Health Administration Category Chemical substances ... more details
In inorganic chemistry , a homoleptic chemical compound is a metal compound with all ligand s identical. ref GoldBookRef title homoleptic file H02850 ref The term uses a homo prefix to indicate that something is the same for all. Some compounds with names that suggest that they are homoleptic are in fact heteroleptic, because they have ligands in them which are not featured in the name. For instance dialkyl magnesium complexes which are found in the Chemical equilibrium equilibrium which exists in a solution of a Grignard reagent in an ether , have two ether ligands attached to each magnesium centre. Another example is a solution of trimethyl aluminium in an ether solvent such as THF , similar chemistry should be expected for a triaryl or trialkyl borane . Any metal species which has more than one type of ligand is heteroleptic It is possible for some ligands such as dimethyl sulfoxide DMSO to bind with two or more different coordination modes. It would still be reasonable to consider a complex which has only type of ligand but with different coordination modes to be homoleptic. For the complex dichlorotetrakis dimethyl sulfoxide ruthenium II , DMSO coordinates via both sulfur and oxygen atoms. Examples Chromium carbonyl Ferrocyanide Iron pentacarbonyl Nickel carbonyl Tetrakis triphenylphosphine palladium 0 Ferrocene Uranium hexafluoride tetraethyl lead tetramethyl lead tetrabutyl tin trimethylaluminium dimethylmercury Diethylzinc triethylborane Chromate Permanganate Ferroin Iron bis terpyridine References references Category Organometallic chemistry Category Inorganic chemistry ... more details
exist for the generation of organozinc compounds. Oxidative addition . The original diethylzinc synthesis .... Commercially available diorganozinc compounds are dimethylzinc , diethylzinc and diphenylzinc ... to Frankland and concerned the reaction of elemental sodium with diethylzinc 2Na 3 Et sub 2 sub ... more details
Chembox verifiedrevid 401622463 ImageFile Tetraethylgermanium.svg ImageFile Ref Chemboximage correct ?? ImageSize 121 ImageName Structural formula of tetraethylgermanium IUPACName Tetraethylgermanium SystematicName Tetraethylgermane substitutive OR Tetraethylgermanium additive Section1 Chembox Identifiers Abbreviations TEG CASNo 597 63 7 CASNo Ref cascite correct ?? PubChem 11703 PubChem Ref Pubchemcite correct PubChem ChemSpiderID 11211 ChemSpiderID Ref chemspidercite correct chemspider EINECS 209 905 7 UNNumber 1993 RTECS LY5290000 SMILES CC Ge CC CC CC StdInChI 1S C8H20Ge c1 5 9 6 2,7 3 8 4 h5 8H2,1 4H3 StdInChI Ref stdinchicite correct chemspider InChI 1 C8H20Ge c1 5 9 6 2,7 3 8 4 h5 8H2,1 4H3 StdInChIKey QQXSEZVCKAEYQJ UHFFFAOYSA N StdInChIKey Ref stdinchicite correct chemspider InChIKey QQXSEZVCKAEYQJ UHFFFAOYAH Section2 Chembox Properties C 8 H 20 Ge 1 ExactMass 190.077678853 g mol sup 1 sup Appearance Colourless liquid Density 0.998 g cm sup 3 sup BoilingPtCL 163 BoilingPtCH 165 Section3 Chembox Hazards EUClass Hazchem Xn RPhrases R10 , R22 , R36 37 38 SPhrases S16 , S26 , S36 NFPA H 2 NFPA F 3 NFPA R 2 FlashPt 35 C Section4 Chembox Related OtherCpds Tetraethyltin br Tetraethyllead Tetraethylgermanium common name tetraethyl germanium , abbreviated TEG, is an organogermanium compound with the formula Ethyl group CH sub 3 sub CH sub 2 sub sub 4 sub Germanium Ge . Tetraethylgermanium is an important chemical compound used in vapour deposition of germanium. Synthesis Clemens Winkler first reported the compound in 1887 from diethylzinc and germanium tetrachloride , shortly after germanium was discovered in 1887. ref name Winkle2 cite journal author Clemens Winkler journal J. Prak. Chemie volume 36 year 1887 pages 177 209 title Mittheilungen ber des Germanium. Zweite Abhandlung doi 10.1002 prac.18870360119 url http gallica.bnf.fr ark 12148 bpt6k90799n f183.table accessdate 2008 08 20 ref References Reflist External links Tetraethylgermanium http www.sigmaaldrich. ... more details
Orphan date February 2009 Depleted zinc oxide DZO is a zinc oxide depleted in the isotopes of zinc zinc isotope with the atomic mass 64, and used in corrosion inhibitor corrosion prevention in nuclear pressurized water reactor s. The depletion of sup 64 sup Zn is necessary, because this isotope is neutron activation transformed into sup 65 sup Zn by neutron capture . sup 65 sup Zn with a half life of 244.26 days emits Gamma ray gamma radiation with 1.115 MeV . ref cite journal last1 Roost first1 E. last2 Funck first2 E. last3 Spernol first3 A. last4 Vaninbroukx first4 R. title The decay of 65Zn journal Zeitschrift f r Physik volume 250 pages 395 year 1972 doi 10.1007 BF01379752 ref sup 64 sup Zn has a natural abundance of 48.6 , but in DZO it is reduced below 1 . The addition of zinc oxide to the primary water loop of a pressurized water nuclear reactor reduces the corrosion and therefore minimizes the amount of dissolved materials, especially the amount of Cobalt 60 sup 60 sup Co . The isotope separation of zinc is done by gas centrifuge gas centrifugation of diethylzinc . References cite journal title BWR water chemistry a delicate balance doi 10.1680 nuen.40.4.245.39338 first R. L. last Cowan journal Nuclear Energy year 2001 volume 40 issue 4 pages 245&ndash 252 Reflist External links cite web url http www.tracesciences.com depletedzincisotopes.html title Depleted Zinc Isotopes publisher tracesciences.com accessdate 2008 12 13 cite web url http www.nukem.de fileadmin pdf english DepletedZinc.pdf title Depleted Zinc for the Nuclear Industry publisher nukem.de accessdate 2008 12 13 Category Nuclear materials Category Nuclear technology Category Zinc compounds Category Oxides Category Corrosion inhibitors de Depleted Zinc Oxide ... more details
Year nav topic 1848 science The year 1848 in science and technology involved some significant events, listed below. Events September 20 The American Association for the Advancement of Science is set up in Pennsylvania by re formation of the Association of American Geologists and Naturalists , with William Charles Redfield as its first president. Astronomy William Parsons, 3rd Earl of Rosse Lord Rosse studies Messier object M1 and names it the Crab Nebula . September 16 William Cranch Bond and William Lassell discover Hyperion moon Hyperion , Saturn s natural satellite moon . Botany April 16 Joseph Dalton Hooker arrives at Darjeeling to begin the first Europe an plant collecting expedition in the Himalayas . Chemistry Edward Frankland , working in Germany , discovers the Organometallic chemistry organometallic compound diethylzinc . Medicine Rudolf Virchow produces a http www.ajph.org cgi content full 96 12 2102 Report on the Typhus Epidemic in Upper Silesia advocating broad social as well as public health measures to counter such outbreaks. ref cite journal last Silver first George A. month January year 1987 title Virchow, the heroic model in medicine health policy by accolade journal American Journal of Public Health volume 77 pages 82 88 accessdate 2011 04 04 pmid 3538915 pmc 1646803 ref Physics Lord Kelvin discovers the absolute zero point of temperature. Awards Copley Medal John Couch Adams Wollaston Medal for Geology William Buckland Births May 23 Otto Lilienthal d. 1896 in science 1896 , aviation pioneer. November 8 Gottlob Frege d. 1925 in science 1925 , mathematician . Deaths January 9 Caroline Herschel b. 1750 in science 1750 , astronomer . August 7 J ns Jakob Berzelius b. 1779 in science 1779 , chemist . August 12 George Stephenson b. 1781 in science 1781 , locomotive engineer . December 18 Bernhard Bolzano b. 1781 in science 1781 , mathematician . References reflist DEFAULTSORT 1848 In Science Category 1848 Science, 1848 In Category 1840s in science Categ ... more details
reaction Alternatively, diethylzinc may be used instead of the zinc copper couple. The Simmons Smith ..., namely diiodomethane and diethylzinc, can react with allylic thioether s to generate sulfur ylides ... 92246 9 ref with a reaction of cinnamyl alcohol with diethylzinc , diiodomethane and a chiral sulfonamide ... more details
chembox verifiedrevid 396484055 ImageFile Dimethylzinc 3D balls.png ImageSize 200px ImageName Ball and stick model of dimethylzinc IUPACName dimethylzinc OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 10254473 InChI 1 2CH3.Zn h2 1H3 rC2H6Zn c1 3 2 h1 2H3 InChIKey AXAZMDOAUQTMOW WPFVDKAYAX StdInChI Ref stdinchicite correct chemspider StdInChI 1S 2CH3.Zn h2 1H3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey AXAZMDOAUQTMOW UHFFFAOYSA N CASNo Ref cascite correct CAS CASNo 544 97 8 PubChem SMILES C Zn C Section2 Chembox Properties Formula Zn CH sub 3 sub sub 2 sub MolarMass 95.478 g mol Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Dimethylzinc , also known as Zinc methyl, DMZ, or DMZn is a colorless mobile liquid Zn CH sub 3 sub sub 2 sub , formed by the action of methyl iodide on zinc at elevated temperature or on zinc sodium alloy. Hota, N.K., Willis, C.J. doi 10.1016 S0022 328X 00 92419 7 An improved preparation of dialkylzinc compounds J. Organometal. Chem. 9 1 1967 169 170 72 Foster, D.F. Cole Hamilton, D.J. Inorg. Synth. 31 1997 29 66 2Zn 2CH sub 3 sub I Zn CH sub 3 sub sub 2 sub ZnI sub 2 sub The sodium assists the reaction of the zinc with the methyl iodide. Zinc iodide is formed as a byproduct. It has a disagreeable odor , and is spontaneously flammable in air. It has been of great importance in the Chemical synthesis synthesis of organic compounds . It is soluble in alkanes and often sold as a solution in hexanes. It belongs to the large series of similar Chemical compound compounds such as diethylzinc . History This substance was first prepared by Edward Frankland during his work with Robert Bunsen in 1849 at the University of Marburg . After heating a mixture of zinc and methyl iodide in an airtight vessel a flame bursted out after the seal was broken. ref cite journal author Edward Frankland E. Frankland journal Liebigs Annalen ... more details
Image OrganogermaniumEquivalent.png 150px right Organogermanium compounds and chemistry Organogermanium compounds are organometallic compound s containing a carbon to germanium or hydrogen to germanium chemical bond . Organogermanium chemistry is the corresponding chemical science. ref Main Group Metals in Organic Synthesis , Hisashi Yamamoto Editor , Koichiro Oshima Editor ISBN 3 527 30508 4 2004 ref Germanium shares carbon group group 14 in the periodic table with silicon , tin and lead and not surprisingly the chemistry of organogermanium is in between that of Organosilicon organosilicon compounds and organotin compound s. The main reason why the organogermanium is of limited organic synthesis synthetic value are the costs of germanium compounds. On the other hand germanium is advocated as a non toxic alternative to many toxic organotin reagents and compounds like tetramethylgermanium and tetraethylgermanium are used in the microelectronics industry as precursors for germanium dioxide chemical vapor deposition . The first organogermanium compound, tetraethylgermane, was synthesised by Winkler in 1887, by the reaction of germanium tetrachloride with diethylzinc . ref name Winkle2 cite journal first Clemens last Winkler journal J. Prak. Chemie volume 36 year 1887 pages 177&ndash 209 title Mittheilungen ber des Germanium. Zweite Abhandlung doi 10.1002 prac.18870360119 url http gallica.bnf.fr ark 12148 bpt6k90799n f183.table accessdate 2008 08 20 ref The organogermanium compound 2 carboxyethylgermasesquioxane bis 2 Carboxyethylgermanium sesquioxide was first reported in 1966. ref citeweb title Bis 2 carboxyethylgermanium IV sesquioxide url http www.germaniumsesquioxide.com Pages History 20Germanium 20Sesquioxide.html ref Organogermanes Organogermanes of the type R sub 4 sub Ge with alkyl R groups are accessed through the cheapest available germanium precursor germanium tetrachloride and alkyl nucleophiles. The following trends are observed going down the carbon grou ... more details
chembox verifiedrevid 399709657 ImageFile Ref chemboximage correct ?? ImageFile Dichlorodimethylsilane.svg ImageSize 100px ImageFileL1 Dichlorodimethylsilane MW 3D balls.png ImageFileR1 Dichlorodimethylsilane MW 3D vdW.png IUPACName Dichlorodimethylsilane OtherNames Dichlorodimethylsilane, dichlorodimethylsilicon, dimethylsilicon dichloride, dimethylsilane dichloride, DMDCS Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 6158 UNII Ref fdacite correct FDA UNII 8TSJ92JX69 InChI 1 C2H6Cl2Si c1 5 2,3 4 h1 2H3 InChIKey LIKFHECYJZWXFJ UHFFFAOYAT StdInChI Ref stdinchicite correct chemspider StdInChI 1S C2H6Cl2Si c1 5 2,3 4 h1 2H3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey LIKFHECYJZWXFJ UHFFFAOYSA N CASNo 75 78 5 CASNo Ref cascite correct CAS PubChem 6398 SMILES C Si C Cl Cl MeSHName Section2 Chembox Properties C 2 H 6 Si 1 Cl 2 Appearance clear liquid Density 1.064 g· cm sup 3 sup liquid l MeltingPtC 76 BoilingPtC 70 Solubility Decomposes in water Section3 Chembox Hazards MainHazards FlashPt Autoignition Section7 Chembox Hazards EUClass NFPA H NFPA F NFPA R FlashPt 9 C RPhrases R11 R36 R37 R38 SPhrases S16 S26 S29 S33 S37 39 Dimethyldichlorosilane is a tetrahedral, organosilicon compound with the formula Si CH sub 3 sub sub 2 sub Cl sub 2 sub . At room temperature it is a colorless liquid that readily reacts with water to form both linear and cyclic Si O chains. Dimethyldichlorosilane is made on an industrial scale as the principal precursor to dimethylsilicone and polysilane compounds. History The first organosilicon compounds were reported in 1863 by Charles Friedel and James Crafts who synthesized tetraethylsilane from diethylzinc and silicon tetrachloride . ref name silicon Silicon Organosilicon Chemistry. Encyclopedia of Inorganic Chemistry Online, 2nd ed. Wiley New Jersey, 2005. doi 10.1002 0470862106.ia220 ref However, major progress in organosilicon chemistry did not occur until Kipping ... more details
are much weaker than those of zinc. Organometallic compounds File Diethylzinc structure.png left thumb 100px Diethylzinc Organozinc compound s contain zinc&mdash carbon covalent bonds. Diethylzinc ... more details
Image OrganosiliconLogo.png right 150px Organosilicon compounds Organosilicon compounds are Organic chemistry organic chemical compound compounds containing carbon silicon chemical bond bonds . Organosilicon chemistry is the corresponding science exploring their properties and reactivity. ref Silicon in Organic Synthesis Colvin, E. Butterworth London 1981 ref Like carbon, the organically bound silicon is tetravalent and tetrahedral molecular geometry tetrahedral . Carbon silicon bonds are generally absent in biochemistry biochemical processes, ref Organosilicon Chemistry S. Pawlenko Walter de Gruyter New York 1986 ref although there are reports of their fleeting existence in a freshwater alga . ref name kin2002 Stephen D. Kinrade, Ashley M. E. Gillson and Christopher T. G. Knight 2002 , Silicon 29 NMR evidence of a transient hexavalent silicon complex in the diatom Navicula pelliculosa . J. Chem. Soc., Dalton Trans., 307 309, DOI 10.1039 b105379p ref The first organosilicon compound, tetraethylsilane was discovered by Charles Friedel and James Crafts in 1863 by reaction of tetrachlorosilane with diethylzinc . The carbosilicon silicon carbide is an inorganic chemistry inorganic compound. Organosilanes Carbon silicon bonds compared to carbon carbon bonds are longer 186 picometer pm vs. 154 pm and weaker with bond dissociation energy 451 kilojoule kJ mole unit mol vs. 607 kJ mol ref Handbook of Chemistry and Physics , 81st Edition CRC Press ISBN 0 8493 0481 4 ref . The C Si is somewhat polarized towards carbon due to its higher electronegativity C 2.55 vs Si 1.90 . One manifestation of bond polarization in organosilanes is found in the Sakurai reaction . In oxidative couplings silicon is represented by the Hiyama coupling . Certain alkyl silanes can be oxidized to an alcohol in the Fleming Tamao oxidation . Certain allyl silanes can be prepared from allylic ester such as 1 and monosilylcopper compounds such as 2 in ref Mechanistic insight into copper catalysed allylic ... more details
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