(pi)C-H center dot center dot center dot S, (allyl)C-H center dot center dot center dot C(pi) and pi center dot center dot center dot pi intermolecular interactions: synthesis, characterization, and crystal structure of 2,2'-bipyridine bis(diallyldit

摘要

A mixed-ligand Zn(II) complex formulated as [Zn(aldtc)(2)(bipy)] (aldtc=diallyldithiocarbamate; bipy=2,2 '-bipyridine) was synthesized and characterized by IR, H-1 and C-13 NMR spectral measurements and X-ray crystallography. The crystal structure of this complex indicates that Zn has a distorted octahedral geometry. The Zn-N distances are invariant (2.168(2) angstrom), while those of the Zn-S are slightly different (2.5408(9) and 2.5440(9) angstrom). The N-Zn-N, S-Zn-S and N-Zn-S bond angles are in the range 75.35(13)-99.75(7)degrees, 70.48(3)-161.02(5)degrees and 95.26(7)-160.32(7)degrees, respectively. The crystal packing of the complex shows different motifs of supramolecularity resulting from both hydrophilic ((pi)C-(HS)-S-...) and hydrophobic ((allyl)C-(HC)-C-...(pi)) intermolecular interactions. These interactions result in a chain arrangement of molecules along crystallographic c axis and the chains are further connected via pi(...)pi stacking along with ((pi)C-(HS)-S-... along b axis leading to an overall crystal packing that can be regarded as layers of complexes along bc plane, which are held together through nonconventional hydrogen bonding and pi(...)pi stacking.