Manganese complexes nitrogen

At the same time the bond angles (C—N—C) at the N7 position vary from 112 (-fp3 as expected for an amine ligand) in the manganese complex (where repulsion is least) up to a maximum value of 120 in the iron complex with maximum repulsions. The tertiary amine nitrogen atom (N7) corresponds to a three-ribbed umbrella that has been inverted by the wind (the handle is the lone pair directed at the metal). As the a, and If levels fill, the repulsions increase, the metal-nitrogen distance increases, and the umbrella begins to flatten ... 

A number of nitrido manganese complexes have been reported. Most of these complexes are Mnv, with only one example reported for Mnvn. These complexes typically incorporate polydentate ligands thus, no examples could be found of simple halide or alkoxide nitrido manganese complexes. Since the original disclosure by Groves and co-workers that these could be utilized as nitrogen transfer reagents, they have received considerable attention [48,49]. ... 

Asymmetric Nitrogen Transfer with Nitrido-manganese Complexes... 

Golubkov G, Gross Z (2005) Nitrogen atom transfer between manganese complexes of salen, porphyrin, and corrole and characterization of a (nitrido)manganese(VI) corrole. J Am Chem... 

The synthesis and X-ray crystal structure of the macrocyclic bisphosphine oxide manganese complex (75) have been reported. A stable P-bonded phosphinidene oxide complex (77) of rhenium (1) has been prepared from (76) by nitrogen replacement with C-tertiarybutylphosphaalkyne followed by hydrolysis. 1 X-Ray crystallography was used to determine the structure of (77). What is reported to be the first complex (78) with a PO ligand has been prepared. 2 The molecular structure of (78), determined by X-ray crystallography, shows an exceptionally short PP distance. 

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