
%0 Journal Article
%A Bottomley, GA 
%A Glossop, LG 
%A Raston, CL 
%A White, AH 
%A Willis, AC 
%T Crystal structures of (RS)-Di-&#956;-chloro-tetrakis(ethane-1,2-diamine)nickel(II) dichloride and diperchlorate
%J Australian Journal of Chemistry
%D 1978/02/01
%V 31
%N 2
%P 285-290
%K 
%R https://doi.org/10.1071/CH9780285
%U https://www.publish.csiro.au/paper/CH9780285 
%X The crystal structures of [(en)2NiCl2Ni(en)2] Cl2 (1) and [(en)2NiCl2Ni(en)2] (ClO4)2 (2) have been redetermined from single- crystal X-ray diffraction data at 295(1) K and refined by least squares to residuals of 0.073 and 0.052 respectively for 1345 and 1605 'observed' reflections respectively. Crystals of (1) are monoclinic, P21/n, a 14.053(4), b 11.309(3), c 6.326(1) &#506;, &#946; 94.22(2)°, Z 2. Crystals of (2) are monoclinic, P21/n, a 8.885(12), 6 19.707(20), c 7.120(8) &#506;, &#946; 108.99(4)°, Z 2. In both (1) and (2), a dimeric complex cation is observed, a pair of cis coordination sites about the nickel in each case being occupied by the bridging chlorines; the latter are asymmetric (Ni-Cl, 2.461(3), 2.551(3)(1); 2.461(3), 2.512(3) &#506; (2)). 
