Add time:08/29/2019         Source:sciencedirect.com

A series of new octahedral Mn(I) complexes fac-(CO)3(depe)Mn—Z (depe = 1,2-bis(diethylphosphino)ethane, Z = H, OTs, OMe, OC(O)OMe, NCO, Cl, Br, N3) have been prepared and characterized, particularly with respect to their infrared spectra. The variations observed in the carbonyl stretching frequencies associated with the coordinated carbon monoxides are a function of the Z groups. Comparison of these spectra with similar spectra of the analogous dppp, 1,3-bis(diphenylphosphino)propane and dppe, 1,2-bis(diphenylphosphino)ethane complexes shows the effect of substituting phenyl groups for ethyl groups on the phosphorus atom. The depe azido complex (Z = N3) reacts with alkynes to give a triazolato complex which on hydrolysis with HCl liberates the triazole and regenerates the chloro complex from which the azido complex is made.

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