
TY  - JOUR
A1  - Bowmaker, GA 
A1  - Pakawatchai, C 
A1  - Skelton, BW 
A1  - Thavornyutikarn, P 
A1  - Wattanakanjana, Y 
A1  - White, AH 
T1  - Vibrational Spectra and Crystal Structures of Tris- and Tetrakis(ethylenethiourea)copper(I) Systems
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1994
VL  - 47
IS  - 1
SP  - 15
EP  - 24
KW  - 
UR  - https://doi.org/10.1071/CH9940015 
N2  - A room-temperature redetermination of the crystal structure of [Cu(SC(NHCH2)2)3]2 (SO4) has been carried out. The original determination, recorded in communication format in space group Ic , Z = 4, seemingly with the full formula as the asymmetric unit, is at variance with our findings which describe the structure in space group R3c, a 12.741(7), c 35.59(1) &#506; (hexagonal setting), Z = 6, with one-third of each of two independent cations , each lying on a threefold axis, comprising the asymmetric unit. The sulfate ion also lies on a threefold axis in proximity to only one of the two cations , the S-O axial bond approaching the copper atom normal to the planar CuS3 array [Cu-S, O 2.269(2), 2.834(8)&#506;]; in the other cation, unperturbed by any sulfate approach, Cu-S is appreciably shorter [2.246(2)&#506;]. R was 0.029 for 905 'observed' reflections. A redetermination of the structure of tetrakis ( ethylenethiourea )copper(I) nitrate is also recorded; crystals are triclinic, P&#299; , a 13.211(2), b 11.2167(4), c 7.566(3) &#506;, &#945; 81.93(2), &#946; 78.35(3), &#947; 87.22(1)&#176;, Z = 2, R being 0.031 for 3861 independent 'observed' reflections. The copper environment is quasi-tetrahedral, Cu-S ranging between 2.3322(9) and 2.3658(12) &#506;, and S-Cu-S 98.76(3)-117.83(3)&#176;. The vibrational (far-infrared and Raman) spectra are recorded for these CuSn systems, and discussed and assigned in the light of the structural results. 
ER  -

