Synthesis and Molecular Structures of [Rh(η⁵‐C₅H₅)(coe)₂] (coe =cis‐cyclooctene) and [Rh(η⁵‐C₅H₅)(cod)] (cod =cis,cis‐η⁴‐1,5‐cyclooctadiene)

Abstract

Abstract. The synthesis and structural characterization of the new olefinic complex [Rh(η 5 -C 5 H 5 )(coe) 2 ] (2) (coe = cis-cyclooctene) is reported. The title compound could easily be prepared in good yield by reaction of [{Rh(μ-Cl)(coe) 2 } 2 ] (1) with an appropriate amount of thallium cyclopentadienide in THF at room temperature. Single crystals of 2 were grown from n-hexane and were analyzed by

Complexes of Platinum Group Elements Containing the Intrinsically Chiral Cyclopentadienide Ligand (CpC)−1

“…Bonegardt et al and Zherikova et al reported Ir–C Cp bond lengths of 2.192–2.275 Å and Ir–C COD bond lengths of 2.101–2.133 Å for (η 5 -C 5 Me 5 )­Ir­(η 4 -COD) and (η 5 -C 5 H 4 Me)­Ir­(η 4 -COD), which are close to the data measured for 4 . From rhodium­(I), (η 5 -C 5 H 5 )­Rh­(η 4 -COD) and (η 5 -C 9 H 7 )­Rh­(η 4 -COD) (η 5 -C 9 H 7 – :η 5 -indenide) have structurally been characterized, showing bond parameters similar to those of 3 …”

Introducing the Perfluorinated Cp* Ligand into Coordination Chemistry

“…The remaining hydrogen Cp signal arises at δ = 5.84 ppm, while the olefinic COD hydrogens are found at δ = 4.51 ppm. [38] The same applies to the low field shifted COD carbon signals which were observed in the 13 C-{ 1 H} NMR spectra. In contrast, the [C 5 (CF 3 ) 4 H] À signals appeared in the 13 C{ 19 F} NMR spectra, displaying two singlets at δ = 121.8 ppm and 121.5 ppm for the trifluoromethyl groups, while Cp carbon signals were distinctly splitted due to 1 H and 103 Rh coupling.…”

An Entry to Double Phosphanyl‐Bridged Dinuclear Rhodium(II) Complexes

“…Reagents were purchased commercially from ABCR and used without further purification. Complex [RhCp(coe) 2 ] ( 1 ) was prepared by the known literature procedure . NMR spectra were obtained using a Jeol Eclipse 400 instrument operating at 400 ( 1 H) and 162 MHz ( 31 P) respectively.…”