
%0 Journal Article
%A Hoskins, BF 
%A Williams, GA 
%T The crystal structure of a binuclear cobalt(II) complex of a macrocyclic ligand
%J Australian Journal of Chemistry
%D 1975/12/01
%V 28
%N 12
%P 2607-2614
%K 
%R https://doi.org/10.1071/CH9752607
%U https://www.publish.csiro.au/paper/CH9752607 
%X The crystal and molecular structure of LCo2Br2,CH3OH (where LH2 represents the macrocycle obtained by condensation of two molecules each of propane-1,3-diamine and 2-hydroxy-5-methyl-isophthalaldehyde) has been determined by single-crystal X-ray diffraction techniques. The compound crystallizes in the monoclinic space group P21/c with two molecules in a cell of dimensions a 9.8723(5), b 16.891(1), c 8.0745(5)&#506; and 102.06(1)°. Counter methods were used to collect the 2004 independent reflections above background and the structure was refined by least-squares methods to a conventional R-factor of 0.049. The structure is molecular, consisting of discrete binuclear units LCo2Br2,CH3OH, containing two cobalt(II) atoms separated by 3.158(2) &#506;. Each cobalt atom is in an identical pseudo-square-pyramidal environment, in agreement with the conclusion drawn from the electronic spectrum of the complex, with an N2O2 basal plane and a bromine atom coordinated at the apex. The methanol molecule is disordered and partially occupies the sixth coordination site of each cobalt, with a long bond of 2.503(9) &#506; between the cobalt and the methanol oxygen atom. The central carbon atom of the propane-1,3-diamine residue is also disordered, occupying partially each of two positions. 
