Primary amido and amine adduct complexes of gallium: synthesis and structures of [t-Bu2Ga(μ-NHPh)]2 and t-Bu3Ga·NH2Ph

David A. Atwood, Richard A. Jones, Alan H. Cowley, Simon G. Bott, Jerry L. Atwood

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Reaction of t-Bu2GaCl with LiNHPh in toluene/diethylether (4 : 1) at -78°C gives the dimeric primary amido complex [t-Bu2Ga(μ-NHPh)]2 (1) in 60% yield. The reaction of t-Bu3Ga with NH2Ph at -78°C in toluene gives the adduct t-Bu3Ga·NH2Ph (2) in 75% yield. The structures of both compounds have been determined by X-ray crystallography. The molecular geometry of 1 consists of a dinuclear unit with two bridging NHPh groups and two terminal t-Bu groups bound to each gallium atom. The coordination geometry of both the gallium and nitrogen atoms is distorted tetrahedral. The molecular geometry of 2 involves a fairly long dative N→Ga donor bond [2.246(9) Å] and the configuration of the amine is distorted from an idealized tetrahedral geometry due to steric repulsions. Crystallographic data for both 1 and 2 suggest the presence of close interactions between the NH hydrogen atoms and the gallium atoms (NH ... Ga).

Original languageEnglish
Pages (from-to)1897-1902
Number of pages6
JournalPolyhedron
Volume10
Issue number16
DOIs
StatePublished - 1991

Bibliographical note

Funding Information:
Acknowledgements-We thank the Robert A. Welch Foundation, the National Science Foundation and the Army Research Office (DAAL 03-89-K-0164) for support.

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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