文摘
Rather than achieving bis-deprotonation of the phosphine, reaction of Cpb>2b>Mn (Cp = cyclopentadienyl) with t-BuPHb>2b> at room temperature yields monodeprotonation of half of the available phosphine in the product (t-BuPHb>2b>)(畏5-Cp)Mn{渭-(t-BuPH)}b>2b>Mn(Cp)(t-BuPHb>2b>) (<b>1b>). This complex comprises a Mn(II) phosphide and is a dimer in the solid state, containing a Mnb>2b>Pb>2b> diamond core. Consistent with the observation of a relatively short intermetal distance of 2.8717(4) 脜 in <b>1b>, DFT analysis of the full structure points to a singlet ground state stabilized by a direct Mn鈥揗n single bond. This is in line with the diamagnetic character of <b>1b> and an 18-electron count at Mn.