Layered Transition Metal Nitroprussides: Their Preparation, Crystal Structure, and Magnetic Properties

D. M. GIL; HERNANDEZ OSIRY; A. RODRIGUEZ; A. A. LEMUS-SANTANA; R. E. CARBONIO; E. REGUERA

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2016 p. 1690 - 1690

1434-1948

ivalent transition metal (T) nitroprussides form aseries of insoluble coordination compounds, which generallycrystallize in 3D frameworks, except for a layered (2D) phase ofcopper. In this contribution, the preparation of layered phasesfor T = Mn, Fe, Co, Ni, Zn, and Cd is reported. The incorporationof imidazole (Im) during their preparation by the precipitationmethod inhibits the coordination of the axial CN groups to themetal T, and layered (2D) structures of formula unitT(Im)2[Fe(CN)5NO] result. The metal T is found coordinated tothe N end of the equatorial CN groups. Imidazole moleculesoccupy its axial coordination sites. In the interlayer region, imidazole molecules from neighboring layers interact through theirdipole and quadrupole moments. The stacking of the aromaticrings from neighboring molecules deviates from the sandwichtypeconfiguration, which in turn weakens the magnetic interactionsbetwe