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Bis(N,N-diethyl-N′-benzoylselenoureato)lead(II) has been prepared and characterized by single-crystal structure analysis. Pb(C 12 H 15 N 2 OSe)2 crystallizes in the non-centrosymmetric orthorhombic space group Iba2. The cell parameters are a = 13.206(3), b = 20.542(4), c = 10.089(2) A and Z = 4. R = 0.025. The direction of the polar axis was determined unambig­ uously. Pb(II) is bidentally coordinated to two N,N-diethyl-N′-benzoylselenourea molecules. The coordination polyhedron is a distorted pseudo-trigonal bi-pyramid with one equatorial position occupied by an electron lone-pair. The Pb-Se and Pb-O bond lengths are 2.876(1) and 2.444(4) Å, respectively. In the crystal lattice, each Pb atom also shows interactions with two Se atoms of a neighboring molecule. The Pb-Se distance of that interaction is 3.643 Å.

zeitschrift für naturforschung b

(Se,O)-Koordinierte Komplexe niedervalenter Hauptgruppenmetalle: Die Kristallstruktur von Bis(N,N-Diethyl-N′-benzoylselenoureato)blei(II) / (S e,O)-Coordinated Complexes of Subvalent Main Group Metals: The Crystal Structure of Bis(N ,N -diethyl-N′-benzoylselenoureato)lead(II)