The synthesis and crystal structure of the multidentate PPN ligand 2-[bis(diisopropylphosphanyl)methyl]-6-methylpyridine (L), CHNP, are described. In the isostructural tetrahedral Fe and Co complexes of type LMCl (M = Fe, Co), namely {2-[bis(diisopropylphosphanyl)methyl]-6-methylpyridine-κP,N}dichloridoiron(II), [FeCl(CHNP)], and {2-[bis(diisopropylphosphanyl)methyl]-6-methylpyridine-κP,N}dichloridocobalt(II), [CoCl(CHNP)], the ligand adopts a bidentate P,N-coordination, whereas in the case of the octahedral Mn complex {2-[bis(diisopropylphosphanyl)methyl]-6-methylpyridine-κP,P'}bromidotricarbonylmanganese(I), [MnBr(CHNP)(CO)], the ligand coordinates via both P atoms to the metal centre.
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