Preference for nitrogen versus oxygen donor coordination in uranyl- and neptunyl(VI) complexes.
The first actinyl phosphinimine complexes have been synthesized and, in the case of uranium, exhibit strong U-N interactions. Competition reactions clearly demonstrate a surprising preference for R3P=NH ligands over R3P=O in the system [AnO2Cl2(R3PX)2] (An = U(VI), Np(VI); R = Ph, Cy; X = O, NH). Spectroscopic evidence for N-donor coordination to [NpO2]2+ in solution indicates chemical similarities to the [UO2]2+ moiety.
Sarsfield
Mark J
MJ
Nexia Solutions, Sellafield, Seascale, Cumbria CA20 1PG, UK. mark.sarsfield@nexiasolutions.com
May
Iain
I
Cornet
Stephanie M
SM
Helliwell
Madeleine
M