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- W1581936102 abstract "Abstract The meta and para isomers of N,N -dimethylaminophenyl(aquo)cobaloximes have been prepared and the p K a 's of their conjugate acids have been determined for the complexes with six different axial ligands (L OH 2 , SCN − , NCS − , S -methyl-2-mercaptoethanol, CN − , and N 3 − ). These p K a values have been correlated with those of 13 other N,N -dimethylanilinium ions with non-cobalt substituents via a dual substituent parameter equation which allows separation of inductive and resonance substituent effects. The results show that resonance interactions (of the anilium type) between the cobaloxime chelated cobalt centers and covalently bond N,N -dimethylaminophenyl groups are negligible for all complexes studied. In comparison with earlier work on 19 F NMR chemical shifts of fluorophenylcobaloximes in which substantial resonance effects were found, the current results imply that although the cobalt d -orbitals are most likely involved in resonance interactions between cobaloxime chelated cobalt centers and covalently bound aryl groups, negative charge cannot be stabilized on the cobalt atom by acceptance of an electron pair into an unoccupied cobalt d -orbital." @default.
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- W1581936102 date "1983-02-01" @default.
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- W1581936102 title "Substituent effect of chelated cobalt." @default.
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- W1581936102 doi "https://doi.org/10.1016/s0022-328x(00)98556-5" @default.
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