Structural studies of uranyl complexes of diphenyl-dimethylaminosulfonylmethyl phosphine oxide and diisopropyl-tolylsulfinylmethyl phosphonate ligands

Autor: Robert R. Ryan, S. Karthikeyan, Robert T. Paine, D.T. Cromer
Rok vydání: 1990
Předmět:
Zdroj: Inorganica Chimica Acta. 172:165-172
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(00)80852-x
Popis: The molecular structures of the bifunctional ligand, (C 6 H 5 ) 2 P(O)CH 2 S(O) 2 N(CH 3 ) 2 ( 1 ), and its coordination complex, UO 2 (NO 3 ) 2 [(C 6 H 5 ) 2 P(O)CH 2 - S(O) 2 N(CH 3 ) 2 ] 2 ( 2 ), were determined by single crystal X-ray diffraction techniques, and the structural influences on the ligand due to coordination were examined. The ligand 1 crystallizes in the monoclinic space group Cc , with a = 15.982(3), b = 10.003(2), c = 10.245(3) A, β = 99.47(2)°, Z = 4 and V = 1615.5 A 3 , R F = 2.8% on 1158 unique reflections ( I ≥ 2σ( I )). Complex 2 is found in the monoclinic space group P 2 1 / c , with a = 12.680(3), b = 16.149(5), c = 20.204(6) A, β = 107.17(2), Z = 4 and V = 3952.7 A 3 , R F = 5.2% on 5060 unique reflections ( I ≥ 2σ( I )). The complex contains two phosphine oxide ligands bonded to the uranium atom through the phosphoryl oxygen atoms in a trans orientation with UO(P) 2.35(1) A. The molecular structure for the sulfinylmethylphosphonate complex, UO 2 (NO 3 ) 2 [(i-C 3 H 7 O) 2 P(O)CH 2 S(O)( p -CH 3 C 6 H 4 )] ( 3 ), was also determined by single crystal X-ray diffraction techniques, and it crystallized in the monoclinic space group P 2 1 / c , with a = 10.759- (8), b = 13.811(3), c = 17.823(5) A, β = 105.83(3)°, Z = 4 and V = 2548 A 3 , R F = 10.9% on 1908 unique reflections ( I ≥ 2σ( I )). The complex shows a single ligand bonded in a bidentate mode to the uranium atom with UO(P) 2.37(2) A and UO(S) 2.36(2) A.
Databáze: OpenAIRE
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