(XCl or Br; dppe=1,2- bis(diphenylphosphino)ethane) could not be isolated from methanol, but were obtained from tetrahydrofuran (thf). All are typical vanadium(II) complexes, and [VCl2(depe)2] and [VCl2(dppe)2]·2thf have trans structures. The VCl bond distances, 2.445(2) and 2.420(1) A, respectively, are similar to that in the known complex [VCl2(dmpe)2], but the VP bond distances are longer by approximately
摘要由
金属和适当的酸制备的卤化
钒(II)[
VCl2(
H2O)4]和[V( )6] Br2与1,2-双(二
甲基膦基)
乙烷(dmpe)和1,在
甲醇中的2-双(
二乙基膦基)
乙烷(去),得到[VX2(dmpe)2]和[VX2(depe)2](X = Cl或Br)。
碘配合物是从[V(MeOH)6] I 2获得的,尽管[VI 2(depe)2]不是纯净的。不能从
甲醇中分离出配合物[VX2(dppe)2]·2thf(X = Cl或Br; dppe = 1,2-双(
二苯基膦基)
乙烷),而是从
四氢呋喃(thf)获得的。它们都是典型的
钒(II)络合物,[
VCl2(depe)2]和[
VCl2(dppe)2]·2thf具有反式结构。VCl的键距分别为2.445(2)和2.420(1)A,与已知络合物[
VCl2(dmpe)2]中的相似,但VP的键距更长,约为0.06 A和PVP角小c。3°,可能是由于赤