C13 NMR of paramagnetic (bi)carbonates

Mariusz Kozik @ Chemistry (@)
Tue, 23 Jul 1996 15:45:46 -0400 (EDT)

I am looking for references (papers or reviews) with C-13 NMR chemical shifts
for paramagnetic cobalt(II) carbonato, bicarbonato or carboxylato
complexes. I saw several reviews of carbon-13 for paramagnetic
metal complexes from the 80's but none of them had the data I am looking
for.

The CAS computer search found several papers by biochemists studying
cobalt-substituted carbonic anhydrase, but in none of these papers was the
carbon-13 signal in paramagnetic carbonate observed directly. The signal
was in the fast exchange with the free ligand and its chemical shift was
only estimated. In addition, I am looking for simple cobalt complexes.

Is anybody out there that knows of the data I am looking for?

Thank you in advance for your time.

Mariusz Kozik.
Department of Chemistry
Canisius College, Buffalo, NY 14208.

Kozik@Canisius.edu