Die Kristallstruktur von Tris(N,N-Diethyl-N′-benzoylselenoureato)indium(III)

The Crystal Structure of Tris(N,N-Diethyl-N′-benzoylselenoureato)indium(III) In(C₁₂H₁₅N₂OSe)₃ crystallizes in the monoclinic space group P2₁/c. The cell parameters are a = 11.792(2), b = 36.797(4), c = 18.574(2) Å, β = 92.15(2)° and Z = 4. The structure was solved with Patterson and direct methods and was refined to a final R-value of 3.41%. The asymmetric unit contains two complex molecules. The indium atoms are bidentally coordinated by three N,N-Diethyl-N′-benzoylselenourea molecules to form distorted octahedra with facial arrangement of the selenium and oxygen donor atoms. The chelate rings diverge strongly from planarity. The In? Se bond lengths vary from 2.643(1) to 2.657(1) Å, the In? O bond lengths from 2.179(4) to 2.203(4) Å, respectively.     

Die Kristallstruktur von Tris(N,N-diethyl-N′-benzoylselenoureato)cobalt(III)

The Crystal Structure of Tris(N,N-diethyl-N′-benzoylselenoureato)cobalt(III) Co(C₁₂H₁₅N₂OSe)₃ crystallizes in the trigonal space group P3 . The cell parameters are a = 16.697(4), c = 8.557(8) Å, Z = 2. The structure was solved with Patterson and direct methods and was refined to a final R-value of 4.59%. Co^III is bidentally coordinated to three N,N-diethyl-N′-benzoylselenourea molecules to form a distorted octahedron with facial arrangement of the selenium and oxygen donor atoms. The Co? Se and Co? O bond lengths are 2.328(2) and 1.943(6) Å, respectively. The arrangement of the molecules within the unit cell leads to the formation of hexagonal channels parallel to the crystallographic c-axis. The wall of the channels is formed by carbon atoms of the phenyl group. The diameter of the channels is 8.148 Å.     

Die Kristallstruktur von Tris(N,N-Diethyl-N′ -benzoylthioureato) Rhodium(III)

Crystal Structure of Tris(N,N-Diethyl-N′-benzoylthioureato) Rhodium(III) Rh(C₁₂H₁₅N₂OS)₃ crystallizes in the trigonal space group P-3. The cell parameters are a = 16.660(2), c = 8.479(1) Å and Z = 2. The structure was solved with Patterson and direct methods and refined to a final R-value of 7.05%. Rh^III is octahedrally coordinated to three N,N-Diethyl-N′ -benzoylthiourea molecules, which are bidentately coordinated through their oxygen and sulfur atoms. The Rh? S and Rh? O bond lengths are 2.284 Å and 2.033 Å, respectively.     

Tris(salicylhydroxamato)manganese(III)

Summary Hydroxamic acids show a degree of selectivity towards transition metal ions having symmetrical d-electron configuration, e.g. vanadium(V) (d⁰) and iron(III) (d⁶⁵). Hydroxamato complexes of metal ions having unsymmetrical d-electron distribution are rare. Thus for manganese(III) (d⁴) only some thiohydroxamato complexes⁽¹⁾ have been characterised so far. In this communication we report on the first synthesis of a salicylhydroxamato complex of manganese(III). Such investigations are of interest because these higher valent manganese complexes are potentially models for the water-splitting complex present in photosystem II⁽²).