N-substituted ethylcarbamate complexes of thorium(IV) and lanthanum(III) nitrates

Abstract

N-substituted ethylcarbamates form with thorium nitrate the complexes Th(NO 3) 4·3RHNC(O)OC 2H 5 (where R = CH 3, C 2H 5, C 6H 5(CH 3)CH) and with lanthanum nitrate the complexes La(NO 3) 3· 2RR′NC(O)OC 2H 5·3H 2O (where R = CH 3, C 2H 5, C 6H 5(CH 3)CH; R′ = H and R = CH 3, C 6H 5; R′ = C 2H 5 or R = R′ = CH 3). In addition the anhydrous La(NO 3) 3·3(C 2H 5) 2NC(O)OC 2H 5 has been isolated. From the IR spectra it is deduced that the carbamates coordinate the metal through the carbonyl oxygen atom and that the nitrato groups act as chelated ligands. 1H nmr spectral data of the complexes are reported and discussed.