Dinuclear Potassium‐Chromium and Potassium‐Tungsten Carbonyl Complexes

Abstract

AbstractThe tetracarbonyl complexes [M(CO)4{η2‐(Ph2P)2NH}] [M = Cr (1a), W (1b)] have been synthesised by reaction of M(CO)6, Me3NO·2H2O, and (Ph2P)2NH. Subsequent treatment of complexes 1a,b with an excess of KH in THF at room temperature yields the potassium salts [Cr(CO)4{η2‐(Ph2P)2N}K(THF)3]n (2a) and [W(CO)4{η2‐(Ph2P)2N}K(THF)2]n (2b), respectively, in almost quantitative yields. The ionic compounds 2a,b are stable at room temperature. All four compounds 1a,b and 2a,b were characterised by single‐crystal X‐ray diffraction. Compounds 2a,b form infinite chains via isocarbonyl bridges in the solid state. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)