Publication Date:
2013-10-12
Description:
(Dicyanamido-κN1)bis(5,5′-dimethyl-2,2′-bipyridine-κ2N,N′)copper(II) tetrafluoroborate, [Cu{N(CN)2}(C12H12N2)2]BF4, (I), and (dicyanamido-κN1)bis(5,5′-dimethyl-2,2′-bipyridine-κ2N,N′)copper(II) perchlorate, [Cu{N(CN)2}(C12H12N2)2]ClO4, (II), are isomorphous and consist of [Cu{N(CN)2}(mbpy)2]+cations (mbpy is 5,5′-dimethyl-2,2′-bipyridine) and BF4−or ClO4−anions, respectively. The CuIIcations in both structures are five-coordinated in distorted trigonal bipyramidal environments by four N atoms of two mbpy ligands and one N atom of the dicyanamide anion, which is coordinated in a monodentate manner in the equatorial plane, with Cu—N distances of 1.980 (3) and 1.977 (2) Å in (I) and (II), respectively. The two axial Cu—Nmbpybonds have very similar values [1.986 (1) Å on average] and are shorter than the other two equatorial Cu—Nmbpybonds. These have different values in the individual compounds but nevertheless form two pairs of similar bonds in (I) and (II) [2.066 (8) and 2.112 (2) Å, respectively, on average]. Besides the ionic forces in both structures, the structures are stabilized by C—H...N and C—H...Xhydrogen bonds (X= F and O, respectively), and by π–π interactions between the pyridine rings of neighbouring mbpy molecules.
Print ISSN:
0108-2701
Electronic ISSN:
1600-5759
Topics:
Chemistry and Pharmacology
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Geosciences
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Physics
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