From: Ken Knott (esprcorn$##$hotmail.com)
Date: Wed Feb 01 2006 - 18:30:02 EST
So I've got two formates boud by the oxygen to a Pt... and the adehydic
protons aren't integrating correctly. They should be integrating to 2 as
their are 2 of them... however, they integrate closer to one in several
variants of the compound. All other characterizations indicate that the
compound is correct. Mass spec is exact and the elemental analysis is
correct other than some small error in the H% which seems to be normal...
HPLC show it's 99.5% pure as well.
How can I explain the incorrect integration of the formate H? NMR's have
been done in both CD3OD and D2O.
It has been suggested that it may be exchanging with the D's...
It has been suggested that is may be acidic....
It has been suggested that the spin relaxation rate of those protons may be
different that those of the pyridine protons it's being integrated against
due to the close proximity of the Pt.
Can anyone offer any other suggestions or comments on those above? Possible
experiments to conduct to explain the integration deviance?
Thanks,
Ken
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