Abstract
Decacarbonyldimanganese reacts with the tritertiary phosphine 1,1,1-tris(diphenylphosphinomethyl)ethane (triphos) to give the ionic complex [Mn(CO)3triphos][Mn(CO)5]. Treatment of [Mn(CO)3triphos][Mn(CO)5] with Na[B(C6H5)4], HClO4 and NH4PF6 yields the manganese(I) salts [Mn(CO)3triphos]Y (Y = B(C6H5)4, ClO4, PF6). The IR (2100-300 cm-1) and FIR spectra (350-200 cm-1) of all compounds are reported. Based on Raman polarization data the assignment of the v(CO) (A1 + E), δ(MnCO) (A1 + 2 E), v(MnC) (A1 + E) and v(MnP) (A1) modes was possible for the coordination polyhedra cis-Mn(CO)3P3(point group C3v). The v(MnP) (E) mode was unobserved due to its very low frequency.
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