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Some Novel Binuclear Group 13 Metal Tin Hydrides Formed in Ar Matrices Following the Codeposition of the Metal Vapor with SnH 4
Author(s) -
Gaertner Benjamin,
Himmel HansJörg,
Macrae Victoria A.,
Pardoe Jennifer A. J.,
Randall Paul G.,
Downs Anthony J.
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200400564
Subject(s) - tin , chemistry , metal , hydride , reagent , dimer , cluster (spacecraft) , crystallography , condensation , organic chemistry , physics , computer science , thermodynamics , programming language
IR measurements show that co‐condensation of Al or Ga atoms (M) with SnH 4 in a solid Ar matrix at about 12 K results mainly in the spontaneous insertion of the metal into an SnH bond to form the M II hydride HMSnH 3 . Simultaneously the Ga 2 dimer also reacts with SnH 4 , possibly to form a nido ‐type cluster Ga 2 (μ‐H) 4 Sn, with a metal‐deficient cubane‐like structure. All of these products are photolabile. Irradiation with visible light causes HMSnH 3 to tautomerize to the novel dihydrido‐bridged species H 2 M(μ‐H) 2 Sn, which decomposes in turn under broad‐band UV‐visible light ( λ =200–800 nm); some H 2 Al(μ‐H) 2 Sn is formed even on deposition. The data collected from experiments with SnH 4 and SnD 4 and different reagent concentrations, together with the results of quantum chemical calculations, are used to interpret the results and elucidate the structures and bonding of the new species.