DC Field | Value | Language |
---|---|---|
dc.contributor.author | KIM, J | - |
dc.contributor.author | KIM, K | - |
dc.contributor.author | KIM, Y | - |
dc.contributor.author | PARK, JT | - |
dc.date.accessioned | 2016-03-31T14:59:46Z | - |
dc.date.available | 2016-03-31T14:59:46Z | - |
dc.date.created | 2009-03-20 | - |
dc.date.issued | 1992-10 | - |
dc.identifier.issn | 0276-7333 | - |
dc.identifier.other | 1992-OAK-0000008628 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/22156 | - |
dc.description.abstract | The reaction of GaMe3 with tBuNH2 at 110-degrees-C affords a mixture of trans- (1a) and cis-[Me2Ga(mu-NHtBu)]2 (1b) which crystallizes as pure 1a in 75% yield. H-1 NMR study shows that the dimeric amido complex undergoes a cis-trans isomerization (1a --> 1b) in solution. The equilibrium has been observed to follow reversible first-order kinetics with DELTAH-degrees = 3.12 +/- 0.04 kJ mol-1 and DELTAS-degrees = 4.56 +/- 0.06 J mol-1 K-1. The activation parameters for the conversion 1a --> 1b are DELTAH-1 = 120.8 +/- 7.4 kJ mol-1 and DELTAS1 = 41.4 +/- 2.6 J mol-1 K-1 and for the reverse reaction 1b --> 1a are DELTAH-1 = 117.8 +/- 7.9 kJ mol-1 and DELTAS-1 = 37.3 +/- 2.5 J mol-1 K-1. The isomerization is markedly accelerated in the presence of pyridine. A crossover experiment indicates that the isomer interconversion is a unimolecular process. On the basis of these data, a possible pathway for the isomerization is proposed. The molecular structure of 1a has been determined by a single-crystal X-ray diffraction study. The molecular geometry of 1a consists of a centrosymmetric and dimeric unit with two bridging amido groups and two terminal methyl groups bound to each gallium atom. The two N-(t)Bu groups are trans to each other with respect to the (Ga-N)2 ring. The coordination geometry of both the gallium and nitrogen atoms is distorted tetrahedral. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ORGANOMETALLICS | - |
dc.title | CIS TRANS ISOMERIZATION AND STRUCTURE OF DIMERIC [ME2GA(MU-NH(T)BU)]2 | - |
dc.type | Article | - |
dc.contributor.college | 화학과 | - |
dc.identifier.doi | 10.1021/om00046a033 | - |
dc.author.google | KIM, J | - |
dc.author.google | KIM, K | - |
dc.author.google | KIM, Y | - |
dc.author.google | PARK, JT | - |
dc.relation.volume | 11 | - |
dc.relation.startpage | 3320 | - |
dc.relation.lastpage | 3323 | - |
dc.contributor.id | 10104366 | - |
dc.relation.journal | ORGANOMETALLICS | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ORGANOMETALLICS, v.11, no.10, pp.3320 - 3323 | - |
dc.identifier.wosid | A1992JT75400033 | - |
dc.citation.endPage | 3323 | - |
dc.citation.number | 10 | - |
dc.citation.startPage | 3320 | - |
dc.citation.title | ORGANOMETALLICS | - |
dc.citation.volume | 11 | - |
dc.contributor.affiliatedAuthor | KIM, K | - |
dc.identifier.scopusid | 2-s2.0-0000636640 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 38 | - |
dc.type.docType | Article | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Inorganic & Nuclear | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Organic | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
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