
%0 Journal Article
%A Searle, GH 
%A Hambley, TW 
%T The preparation and characterization of <I>mer</I>-Bis[di(3-aminopropyl)amine]cobalt(III) perchlorate, and the crystal structure of its hydrolysis product Bis[di(3-aminopropyl)amine]tri-&#956;-hydroxo-dicobat(III) perchlorate
%J Australian Journal of Chemistry
%D 1982/07/01
%V 35
%N 7
%P 1297-1309
%K 
%R https://doi.org/10.1071/CH9821297
%U https://www.publish.csiro.au/paper/CH9821297 
%X mer-[Co(dpt)2] Cl3 [dpt = di(3-aminopropyl)amine] has been obtained from substitution or oxidation reactions in non-aqueous solvents, and transformed to the perchlorate salt. The different form of the 13C n.m.r. spectrum to that of mer-[Co(dien)2]3+ (dien = diethylenetriamine), and variation of the spectrum with basicity, is taken to indicate high conformational mobility of the coupled six-membered chelate rings of the mer structure. Slow hydrolysis occurs in neutral water (but is prevented by acid), and the hydrolysis product has been isolated. The s-fac and u-fac [Co(dpt)2]3+ isomers have not been detected chromatographically in the preparations, and any isomerization of the mer isomer is masked by the hydrolysis. X-ray crystallographic analysis shows that the isolated hydrolysis product is the racemic geometric isomer (C2 symmetry) of [(dpt)Co(OH)3Co(dpt)] (ClO4)3. Each facially coordinated dpt adopts the ring conformations chair, irregular-boat. The crystals are monoclinic, space group P21/n, with a 15.053(5), b 13.964(2), c 14.010(3) Å, &#946; 109.90(2)º. The structure was refined by blocked-matrix least-squares techniques to an R factor (3190F) of 0.032. 
