Synthesis and X‐ray structure of two conformational isomers of [Zn(medpt)(SCN)₂], medpt = bis (3 – aminopropyl)methylamine

Abstract

Two conformational isomers of [Zn (medpt)(NCS) 2 ], medpt=bis(3-aminopropyl) methylamine, (1) and (2) have been synthesised and the crystal structures are determined using single crystal X-ray diffraction. The structures of the complexes have been solved by Patterson method and refined by full-matrix least-squares techniques to R1=0.0524 for (1) and R1=0.0506 for (2), respectively. The geometry around the Zn(II) centre in both isomers is distorted trigonal bipyramidal. The two pendent thiocyanate moieties in (1), with Zn-N-C angles 167.9(4)-173.9(4)º, coordinate the mental centre almost linearly while the corresponding coordinations in (2) are significantly bent [Zn-N-C angles 150.8(3)-153.1(2)°]. Intermolecular N-H…S hydrogen bonds stabilise the crystal packing in the complexes forming infinite chains parallel to the [100] direction. The combinations of molecular chains generate three/two dimensional supramolecular framework in complexes (1) and (2).

Refinement, comparisonal study and EPR measurements on the molecular structure of NN‐diethyldithiocarbamate of Zn(II) and Cd(II)

“…The two zinc atoms are separated by a distance of 3.545 Å and the Zn-S-Zn' angle is 85.464 (17)°. The results obtained here for different bond angles and lengths were comparable to the similar recent report [10]. www.crt-journal.org …”