Synthesis and Structural Comparison of
Tp<sup>iPr</sup><sub><sup>2</sup></sub>Rh[<i>cis</i>-1,2-bis(diphenylphosphino)ethene]: Factors
Determining Hapticity (κ<sup>2</sup> vs κ<sup>3</sup>) of the Tp<sup>iPr</sup><sub><sup>2</sup></sub> Ligand in
Tp<sup>iPr</sup><sub><sup>2</sup></sub>Rh(diphosphine) Complexes
Munetaka Akita
Mariko Hashimoto
Shiro Hikichi
Yoshihiko Moro-oka
10.1021/om0003640.s001
https://acs.figshare.com/articles/dataset/Synthesis_and_Structural_Comparison_of_Tp_sup_iPr_sup_sub_sup_2_sup_sub_Rh_i_cis_i_-1_2-bis_diphenylphosphino_ethene_Factors_Determining_Hapticity_sup_2_sup_vs_sup_3_sup_of_the_Tp_sup_iPr_sup_sub_sup_2_sup_sub_Ligand_in_Tp_sup_iPr_sup_sub_sup_2_sup_sub_Rh/3762870
Comparison of structural and spectroscopic
features of the Rh(I)−diphosphine complexes Tp<sup>iPr</sup><sub><sup>2</sup></sub>Rh(Ph<sub>2</sub>P−X−PPh<sub>2</sub>) reveals that the dominant factor governing hapticity of the Tp<sup>iPr</sup><sub><sup>2</sup></sub> ligand (κ<sup>2</sup> vs κ<sup>3</sup>) is conformation of the central rhodadiphosphacycle. A folded
RhP<sub>2</sub>X conformation hinders coordination of the pendant
pyrazolyl group due to steric repulsion with the bridging
part (X) in diphosphine to lead to a κ<sup>2</sup>-Tp<sup>iPr</sup><sub><sup>2</sup></sub> species,
whereas κ<sup>3</sup>-coordination is found in complexes with a
flat RhP<sub>2</sub>X conformation.
2000-08-05 00:00:00
pendant pyrazolyl group
spectroscopic features
κ 2
steric repulsion
Tp iPr 2 Ligand
Structural Comparison
Tp iPr 2 Rh
Tp iPr 2 species
RhP 2 X conformation
κ 3