The crystal structure of bisethylenethiourea-cadmium thiocyanate

Abstract

bis-Ethylenethiourea-cadmium thiocyanate crystallizes in the monoclinic system and is isostructural with the corresponding lead compound. The cell dimensions are: a=15.60±0.04, b=8.17±0-02, c=ll.51_0.01A; fl=95°41'; the number of formula units per unit cell is 4 and the space group is C~h-C 2/c. The structure has been solved by two-dimensional Patterson and Fourier syntheses, and refinement has been carried out with generalized projections of partial differences and back-shift corrections. The cadmium atom coordinates octahedrally with two sulphur atoms attached to ethylenethiourea molecules, and with two sulphur and two nitrogen atoms in four different NCS groups. The coordination polyhedra are therefore linked in chains by these NCS groups, which form bridges between cadmium atoms.

The crystal and molecular structure of mono-(N,N-diethylnicotinamide)cadmium dithiocyanate

“…Also the carbon-sulphur bonds, C(I)-S(1)= 1.639 (5) and C(2)-S(2)= 1.635 (6) A, agree very well with those found in Zn(N2H4)2(NCS)z were C-S= 1.655 (12)A. The angles Cd-N-C fall in the range of values already found in isothiocyanates for angles M-N-C (Cavalca, Nardelli & Fava, 1960;Owston & Rowe, 1960;Ferrari, Braibanti, Bigliardi & Lanfredi, 1965;Nardelli, Fava Gasparri, Giraldi Battistini & Domiano, 1966;Garaj, 1969). Distances and angles in the organic ligand ( Fig.…”

“…1.00 (5) C(6)--C (7) 1.735 (6) C(9)~H(6) 0.94 (5) 1.458 (6) C(I 1)-H(10) 1.03 (6) C(9)--C(10) 1.510 (9) C(11)-H(11) 1.08 (5) N(4)--C(ll) 1-478 (7) C(12)-H(12) 1.03 (6) C(11)- C(12) 1.504 (9) C(12)-H(13) 1.07 (6) C(12)- H(14) 1.04 (6) Cd-S(2n)=2"621 (3)A, and the angles as well, Cd-S( 1 l)-C( 1 l) = 95.6 (2) ° and Cd-S(2")-C(2") = 101.8 (2) °. These bonds between cadmium and bridging (Cavalca, Nardelli & Fava, 1960). The main difference concerns the cadmium-nitrogen bond which is much longer (2.53 A) in the ethylenethiourea complex.…”

The crystal and molecular structure of bis-(2-thioimidazolidine)-nickel(II) thiocyanate

“…thiocyanates (Nardelli & Chierici, 1958), is quite similar to that of the corresponding cadmium and lead complexes (Cavalca, Nardelli & Fava, 1960) although these last are not isostructural with the previous ones.…”

“…On the contrary, the S-C distance is shorter than that predicted from the curve S-C against Ni-NCS, as calculated by the same author; this fact, which is observed generally, suggests that other configurations, in addition to the one given previously, should be considered. (Scouloudi, 1953), 104 ° in AgSCN (Lindqvist, 1957), 109 ° in Cdetu2(NCS)2 (Cavalca, Nardelli & Fava, 1960), 110 ° in NH4Ag(SCN)2 (Lindqvist & Strandberg, 1957). The lack of collinearity in the NCS group [N(1)-C(4)-S(2) = 178.6°(1.2°)] is not significant.…”

The crystal and molecular structure of di-μ-chloro-bis[thioacetamide(chloro)cadmium(II)]

“…The Cd is octahedrally surrounded by one S atom from thioacetamide and five CI atoms with bond distances and angles quoted in Tables 2 and 3 Coghi & Azzoni, 1958), in bisbiuret-cadmium chloride, 2.55 and 2.62 A (Cavalca, Nardelli & Fava, 1960), in NH4CdCI 3, 2.65 A averaged (Brasseur & Pauling, 1938;Rolies & De Ranter, 1978). On the other hand C1(02) is bonded to three Cd atoms with distances which are significantly different.…”