A new PC(sp(3))P ligand N,N'-bis(diphenylphosphino)dipyrromethane [PCH2P] (1) was prepared and its iron, cobalt and nickel chemistry was explored. Two pincer-type complexes [PCHP]Fe(H)(PMe3)2 (2) and [PCHP]Co(PMe3)2 (4) were synthesized in the reaction of with Fe(PMe3)4 and Co(Me)(PMe3)4. 1 reacted with Co(PMe3)4 and Ni(PMe3)4 to afford Co(0) and Ni(0) complexes [PCH2P]Co(PMe3)2 (3) and [PCH2P]Ni(PMe3)2 (5). The structures of complexes 2-5 were determined by X-ray diffraction.

The introduction and changes of the substituents at the middle carbon atom of the preligand dipyrrolmethane have a significant impact on the reaction results.

Abstract. The reactions of 2-iminopyrroles 1-3 with Fe(PMe 3 ) 4 afforded the N-H activated bis(2-iminopyrrolyl) iron(II) complexes 4-6. The structures of compounds 4-6 were determined by single-

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