Rh(I) and Pd(II) complexes of methoxy functionalized heterocyclic carbene: Synthesis and characterization by M. E. Günay, M. Aygün, A. Kartal, B. Cetinkaya, and E. Kendi

Crystal Research and Technology

Cryst. Res. Technol. 41, 615 (2006) - Abstract -

Rh(I) and Pd(II) complexes of methoxy functionalized heterocyclic carbene: Synthesis and characterization

M. E. Günay, M. Aygün*, A. Kartal*, B. Cetinkaya**, and E. Kendi***

Department of Chemistry, Adnan Menderes University, 09100 Aydýn, Turkey
*Department of Physics, Dokuz Eylül University, Buca 35160 Izmir, Turkey
**Department of Chemistry, Ege University, Bornova 35200 Izmir, Turkey
***Department of Physics Engineering, Hacettepe University, Beytepe 06532 Ankara, Turkey

Keywords	coordination chemistry, rhodium, palladium, carbene complexes, crystal structure
PACS	61.66.Fn
DOI	10.1002/crat.200510635

A new methoxy functionalized 2-(trichloromethyl)-1,3-diarylimidazolidin (6) was synthesized as the precursor for N-heterocyclic carbene complexes of Pd(II) and Rh(I) by the condensation of N,N’-bis(2,4-dimethoxyphenyl)-1,2-diaminoethane with chloral. The structures of all compounds have been elucidated by a combination of multinuclear NMR spectroscopy, elemental analysis and in one instance, by single crystal X-ray diffraction. Compound 8, C₂₇H₃₄N₂O₄ClRh, crystallizes in the triclinic space group P-1 with cell dimensions a = 9.7642(12)Å, b = 11.1914(11)Å, c = 13.0102(14)Å, α = 104.034(9)°, β = 106.658(9)°, γ = 99.658(9)° with Z = 2. The molecular structure of 8 shows the geometry around the Rh metal to be a slightly distorted square planar. The crystal structure shows the formation of centrosymmetric dimers via intermolecular C-H...Cl hydrogen bonds.

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