
TY  - JOUR
A1  - Crea, J 
A1  - Lincoln, SF 
A1  - West, RJ 
T1  - A proton magnetic resonance study of trimethyl phosphate exchange on magnesium(II)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1973
VL  - 26
IS  - 6
SP  - 1227
EP  - 1233
KW  - 
UR  - https://doi.org/10.1071/CH9731227 
N2  - A 1H N.M.R. study of the exchange reaction Mg(tmp)62+ &#8596; tmp (tmp, trimethyl phosphate) in methylene chloride and acetone diluents is reported. A complete signal shape analysis is used to derive kinetic parameters. The value for kex (193 K) in the rate law R = 6kex[Mg(tmp)62+] is 3.2±0.5 s-1, &#916;H? = 70.7±3.8 kJ mol-1, and &#916;S? = 135.1±12.6 J mol-1 K-1 when the Mg2+ : tmp : methylene chloride mole ratio is 1.00 : 12.1 : 34.9. Values of similar magnitude are obtained under different mole ratio and diluent conditions. The tmp exchange is considered to proceed through a dissociative mechanism involving solvent structural rearrangement in the activation process. 
ER  -

