signals, two of which are due to two diastereomers. The EPR spectra of 3 and 4 in THF reveal the presence of octahedral species in solution. The crystal and molecular structures of complexes 3a·OCMe2, 5a, and 5b have been obtained, revealing basically a tetragonal pyramid, and coordination of the sulfur function in the thiocarbonyl (3) or enethiolate mode (5). The relevance of the compounds to bioinorganic
VO2+ 复合物 [VOCl(ONS)] (3) 和 [VO(ONS)'] (4),以及 VO3+ 复合物 [VO(OEt)(ONS)'] (5) ONS = (R)-
水杨醛缩
氨基
硫脲(1-) R = 5,6-
C4H4 (3a) 或 3-OMe (3b);(ONS)' = (R)-
水杨醛[benzylmercaptothiocarbonylhydrazonate(2−)], R = H, (4a/5a) 或 3-OMe (4b/5b)} 已制备并通过 IR、EPR、1H-、和 51V-NMR 光谱。在 (S)-sBuOH 中,4a 转化为 [VO(S)-OsBu}(ONS)'] (5c) 和 [VO(OH)(ONS)'](或其缩合产物)。5c 的溶液显示三个 51V NMR 信号,其中两个是由于两种非对映异构体。THF 中 3 和 4 的 EPR 光谱揭示了溶液中存在八面体物质。已获得