The title compound, [HB(pz)(3)]VCl2(thf) or [VCl2(C9H10BN6)(C4H8O)] (pz = pyrazolyl, thf = tetrahydrofuran), is an analogue of the unknown eta(5)-CpVCl2 (Cp = cyclopentadienyl). The pyrazolyl complex was prepared from VCl3(thf)(3) and K[HB(pz)(3)]. The molecule adopts a structure comparable to the piano-stool arrangement of a half-sandwich complex.
Manzer, L. E., unpublished results in: Gmelin Handbuch der Anorganischen Chemie, Band 23, Borverbindungen Teil 5, Ergaenzungswerk zur 8. Auflage, Springer Verlag, Berlin, Heidelberg 1975, S. 29