New distannanes containing the chiral 2-(4-isopropyl-2-oxazolinyl)-5-phenyl ligand
摘要:
The N-coordinated tin hydrides containing the chiral 2-(4-isopropyl-2-oxazolinyl)-5-phenyl ligand in the presence of catalytic amounts of tetrakis(triphenylphosphine)palladium gave the corresponding distannanes in good yields. The distannanes have been fully characterized by means of the H-1, C-13, N-15 and Sn-117 NMR measurements. The J(N-15-Sn-117/119), J(Sn-117-Sn-119) couplings and single-crystal X-ray analysis of distannane 3 revealed a tendency towards penta-coordination at the tin center as a result of the Sn-N interaction. (c) 2005 Elsevier B.V. All rights reserved.