
TY  - JOUR
A1  - Hoskins, BF 
A1  - Williams, GA 
T1  - The crystal structure of a binuclear cobalt(II) complex of a macrocyclic ligand
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1975
VL  - 28
IS  - 12
SP  - 2607
EP  - 2614
KW  - 
UR  - https://doi.org/10.1071/CH9752607 
N2  - 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. 
ER  -

