
TY  - JOUR
A1  - Searle, GH 
A1  - Hambley, TW 
T1  - 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
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1982
VL  - 35
IS  - 7
SP  - 1297
EP  - 1309
KW  - 
UR  - https://doi.org/10.1071/CH9821297 
N2  - 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. 
ER  -

