1237493-64-9Relevant academic research and scientific papers
Synthesis and structural characterization of a series of dimeric metal(II) Imido complexes {M(μ-NAr#)}2 [M = Ge, Sn, Pb; Ar # = C6H3-2,6-(C6H 2-2,4,6-Me3)2] and the related monomeric primary amido derivatives M{N(H)Ar#}2 (M = Ge, Sn, Pb)
Merrill, William A.,Wright, Robert J.,Stanciu, Corneliu S.,Olmstead, Marilyn M.,Fettinger, James C.,Power, Philip P.
, p. 7097 - 7105 (2010)
The solvent-free reaction of M{N(SiMe3)2}2 (M = Ge, Sn, or Pb) with the sterically encumbered primary amine 2,6-dimesitylaniline Ar#NH2 [Ar# = C 6H3-2,6(C6H2-2,4,6-Me 3)2] at ca. 165-175 °C afforded the highly colored imido dimers {M(μ-NAr#)}2, where M = Ge (1), Sn (2), or Pb (3), with disilylamine elimination. The compounds were characterized by single-crystal X-ray crystallography and heteronuclear NMR spectroscopy. The structures of 1-3 were very similar and had nonplanar four-membered M 2N2 ring cores that are folded along the M -M axis. The nitrogen atoms are planar-coordinated, and the M-N distances are consistent with single bonding. The reaction of M{N(SiMe3)2}2 with Ar#NH2 in a 2:1 ratio in solution at lower temperature afforded the relatively stable monomeric primary amido species M{N(H)Ar#}2, where M = Ge (4), Sn (5), or Pb (6). Complexes 4-6 displayed V-shaped MN2 structures, and 5 and 6 revealed close approaches between the metal atom and ipso-carbon atoms of two flanking Mes groups of the terphenyl substituents [SnII -C (2.957 A) and PbII -C (2.965 A)]. The secondary metal-ligand interactions exerted large effects on their electronic and NMR spectra.
