The protonation of molybdenum and tungsten bis(diphosphine)bis(dinitrogen) complexes: the crystal and molecular structure of bis[1,2-bis(diethylphosphino)ethane]bromo[hydrazido(2–)]tungsten bromide–methanol (2/1)

Abstract

The reactions of [M(N₂)₂(L–L)₂][M = Mo or W; L–L = diphosphine = Et₂PCH₂CH₂PEt₂(depe) or (4-MeOC₆H₄)₂PCH₂CH₂P(C₆H₄OMe-4)₂(dmppe)] with acids HX (X = Cl or Br) yield various products. Those containing nitrogen include [MHX(NNH₂)(L–L)₂]²⁺, and [MX(NNH₂)(L–L)₂]⁺, but the course of the reaction is also solvent dependent. The crystal structure of the complex [WBr(NNH₂)(Et₂PCH₂CH₂PEt₂)₂]Br·0.5MeOH is described.