Summary
Twelve dinuclear complexes, each with a bridging cyano group, of formulaecis-M[(aa)2FCr-NC-Cr(CN)5] andcis- M[(aa)2FCr-NC-CrNO(CN)4] (aa=ethylenediamine or 1,3-diaminopropane; M=K+, Na+ or NH +4 ) have been prepared by solid state heating of the corresponding doubly complexed saltstrans-M[CrF(H2O)(aa)2][Cr(CN)6] andtrans-M [CrF(H2O)(aa)2][CrNO(CN)5]. All have been characterized by chemical analysis, electronic and i.r. spectra and conductivity measurements.
Magnetic susceptibilities down to liquid helium temperature have been determined forcis-K[(en)2FCr-NC-Cr(CN)5],cis-K[(tn)2FCr-NC-Cr(CN)5] andcis-K[(en)2FCr-NC-CrNO-(CN)4]. Slight antiferromagnetic interactions have been found in the first two compounds (J=−1.4 and −1.2 cm−1, respectively). Thecis-K[(en)2FCr-NC-CrNO(CN)4] compound behaves as a Curie paramagnet and a structural model is proposed to explain this fact.
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Ribas, J., Monfort, M. & Casabó, J. Dinuclear complexes with a μ-cyano ligand. part IX. synthesis, characterization and magnetic studies of several derivatives of [Cr(CN)6]3− and [Cr(NO)(CN)5]3− . Transition Met Chem 9, 407–411 (1984). https://doi.org/10.1007/BF00624787
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DOI: https://doi.org/10.1007/BF00624787