N-H(N)…S Bonding in Tetrahedral [Zn(NCS)2L]0 Complexes (L = MexH2-xN(CH2)2NH2-yMey, x, y = 0 - 2)

Abstract

The crystal structures of uncharged tetrahedral dithiocyanato zinc complexes with N‐methylated ethylenediamines have been determined with a view to a study of intermolecular hydrogen‐bonding interactions in these compounds. It is found that the H(N) hydrogen atoms are exhaustively engaged in N–H(N) … S bonds. The majority of these bonds are branched (bifurcated or trifurcated), and the hydrogen‐bond systems they form all contain one of the two characteristic primitive core motifs: either a discrete centrosymmetric […S…H…]2 dimer or an infinite […S…H…]∞ helix about a 21 or pseudo‐21 axis. The hydrogen bonding is analyzed in detail, with particular attention to the existence of correlations between the N–H(N)–S angles and the H(N) … S distances as well as between the corresponding N–H(N)–S/H(N)…S pairs in the bifurcated N–H(N)…2 S bonds.

[2-(Piperidin-1-yl)ethylamine]dithiocyanatozinc(II)

“…1). The coordinate bond lengths and angles are typical and are comparable with those observed in other related zinc(II) complexes (Cameron et al, 1998;Hong, 2007).…”

“…For related structures, see: Wang et al (2009a,b); Wang (2009). For bond-length and angle data, see: Cameron et al (1998); Hong (2007).…”

Structural trends in one and two dimensional coordination polymers of cadmium(ii) with halide bridges and pyridine-type ligands

“…Molecules of 3 adopt idealized C 2v point symmetry. Despite its similarity at the molecular level, 3 differs in packing from the zinc dihalide derivatives [ZnX 2 (py) 2 ] (X ~Cl, 27,28 Br, 29 I 30 ) all three of which are isomorphous.…”

Coordination polymers based on cadmium(ii) pyridine complexes: synthesis, range of existence, and structureDedicated to Prof. Dr. G. E. Herberich on the occasion of his 65th birthday.

“…In general reactions of zinc dihalides with pyridine or its derivatives yield mononuclear tetrahedral complexes. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] In contrast to these findings the chain polymers [Cd(m-X) 2 py 2 ] ' (X ~Cl, Br; py ~pyridine) have already been reported in the literature. 2,15,16 It is tempting to attribute this difference in the coordination chemistry between zinc(II) and the higher homologue cadmium(II) to the size of the cations.…”