
TY  - JOUR
A1  - Buckingham, DA 
A1  - Clark, CR 
A1  - Stewart, I 
T1  - Chelation and Hydrolysis of Orthophosphate Coordinated to Cobalt(III). Reactions of [Co(en)<sub>2</sub>(O<sub>2</sub>PO<sub>2</sub>)] Under Alkaline Conditions
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1989
VL  - 42
IS  - 5
SP  - 709
EP  - 715
KW  - 
UR  - https://doi.org/10.1071/CH9890709 
N2  - Ring opening and closing under alkaline conditions of the four-membered orthophosphate chelate [Co(en)2(O2PO2)] has been followed by both visible absorption and 31P n.m.r. spectroscopy. The former reaction follows the rate law khyd = k2+kl[OH-] with k2 = 2.2 &#215; 10-5 s-1 and k1 = (1.63 ± 0.04)&#215;10-2 mol-1 dm3 s-1, and ring closure the rate law kch = k-2 + k-1 with k-2 = 6&#215;10-4 s-1 for cis -[Co(en)2(OH)(OPO3H)1 and k-1 = 7.5&#215;10-5 s-1 for cis-[Co(en)2(OH)(OPO3)]-, all at 25&#176;C and I = 1.0 mol dm-3 (NaNO3).trans- Monodentate species adopt higher concentrations than cis-monodentate species at equilibrium under all alkaline conditions. 
ER  -

