Synthesis and Structural Investigation of Some Mixed-Ligand Cyanonitrosyl {CrNO}⁵ Complexes of Chromium¹ with Some Potentially Bi-and Tridentate Ligand(s)

Abstract

Some new mixed-ligand cyanonitrosyl complexes of chromium(I) with the formulation [CrNO(CN)₂ (L)₂]_n (where L= 2-, 3-, or 4-(aminomethyl)pyridine) and [CrNO(CN)₂(L′)₂(H₂O)] (where L′= 2-, 3-, or 4-pyridinecarboxaldehyde, 6-methyl-2-pyridinecarboxaldehyde or 2,6-pyridinecarboxaldehyde have been synthesized by the substitution of the cyano groups in K₃[CrNO(CN)₅]. H₂O by the above ligands L and L′. The complexes have been characterized in the solid state on the basis of elemental analyses, room temperature magnetic measurements, electron spin resonance and infrared spectral studies. Suitable structures have been proposed for the complexes. Chromium(I) has a low-spin d₅-configuration in all the complexes.