DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, JE | ko |
dc.contributor.author | Bae, BJ | ko |
dc.contributor.author | Lee, K | ko |
dc.contributor.author | Park, Joon Taik | ko |
dc.contributor.author | Chang, HY | ko |
dc.contributor.author | Choi, MG | ko |
dc.date.accessioned | 2013-03-02T20:01:15Z | - |
dc.date.available | 2013-03-02T20:01:15Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2000-11 | - |
dc.identifier.citation | ORGANOMETALLICS, v.19, no.24, pp.5107 - 5112 | - |
dc.identifier.issn | 0276-7333 | - |
dc.identifier.uri | http://hdl.handle.net/10203/75271 | - |
dc.description.abstract | Reaction of GaMe3 with N,N-dimethylethylenediamine (DMEDA) produces adducts, Me3Ga:NH2C2H4NMe2 (1:1, 1) and Me3Ga:NH2C2H4NMe2:GaMe3 (2:1, 2). A fast concerted intermolecular: exchange of the two inequivalent GaMe3 moieties occurs in 2 at room temperature. Thermolysis of 2 at 210 degreesC in a sealed ampule produces a mixture of cis and trans isomers of tetrametallic imidogallane, [Me2Ga(mu -NC2H4NMe2GaMe2)](2) (3). Slow recrystallization of 3 affords only the cis isomer as colorless crystals, but in solution the cis isomer equilibrates with the trans isomer. The cis --> trans isomerization of 3 has been studied by H-1 NMR spectroscopy. The equilibrium has been observed to follow reversible first-order kinetics with DeltaH degrees = - 3.35 +/- 1.70 kJ mol(-1) and DeltaS degrees = - 10.4 +/- 1.7 J mol(-1) K-1. The activation parameters for the cis --> trans conversion are DeltaH(1)double dagger = 144.6 +/- 6.2 kJ mol(-1) and Delta S(1)double dagger = 105.6 +/- 1.5 J mol(-1) K-1, and those for the reverse process are DeltaH(-1)double dagger = 147.6 +/- 6.4 kJ mol(-1) and DeltaS(-1)double dagger = 115.4 +/- 1.5 J mol(-1) K-1. The isomerization process has been proposed to be assisted by the NMe2 end of DMEDA as an internal Lewis base. The molecular structures of 2 and cis-3 have been determined by single-crystal X-ray diffraction studies. The geometry about the gallium atom of 2 is distorted tetrahedral with a Ga-C (av) distance of 1.98(1) Angstrom and a Ga-N distance of 2.16(1) Angstrom. The molecular geometry of cis-3 involves one four-membered Ga2N2 ring and two five-membered GaN2C2 rings of cis conformation, and it has approximate C-2 symmetry with the C-2 axis going through the center of the Ga2N2 ring. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | SINGLE-SOURCE PRECURSORS | - |
dc.subject | R = ME | - |
dc.subject | STRUCTURAL CHARACTERIZATION | - |
dc.subject | MOLECULAR-STRUCTURES | - |
dc.subject | NITRIDE FILMS | - |
dc.subject | GALLIUM | - |
dc.subject | CRYSTAL | - |
dc.subject | GROWTH | - |
dc.subject | TRIMETHYLGALLIUM | - |
dc.subject | ISOMERIZATION | - |
dc.title | Reaction of GaMe3 with H2NCH2CH2NMe2: Synthesis and characterization of adducts and imidogallane | - |
dc.type | Article | - |
dc.identifier.wosid | 000165617100025 | - |
dc.identifier.scopusid | 2-s2.0-0034311998 | - |
dc.type.rims | ART | - |
dc.citation.volume | 19 | - |
dc.citation.issue | 24 | - |
dc.citation.beginningpage | 5107 | - |
dc.citation.endingpage | 5112 | - |
dc.citation.publicationname | ORGANOMETALLICS | - |
dc.contributor.localauthor | Park, Joon Taik | - |
dc.contributor.nonIdAuthor | Park, JE | - |
dc.contributor.nonIdAuthor | Bae, BJ | - |
dc.contributor.nonIdAuthor | Lee, K | - |
dc.contributor.nonIdAuthor | Chang, HY | - |
dc.contributor.nonIdAuthor | Choi, MG | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | SINGLE-SOURCE PRECURSORS | - |
dc.subject.keywordPlus | R = ME | - |
dc.subject.keywordPlus | STRUCTURAL CHARACTERIZATION | - |
dc.subject.keywordPlus | MOLECULAR-STRUCTURES | - |
dc.subject.keywordPlus | NITRIDE FILMS | - |
dc.subject.keywordPlus | GALLIUM | - |
dc.subject.keywordPlus | CRYSTAL | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | TRIMETHYLGALLIUM | - |
dc.subject.keywordPlus | ISOMERIZATION | - |
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