New coordination mode of bis(diphenylphosphine) methanide diselenide. Synthesis and X-ray crystal structure of [(η5 C5Me5)Rh{η3 (SePPh2)2CH&}]ClO4

Alkali Metal, Magnesium, and Zinc Complexes of Bis(chalcogenophosphinoyl)methanide Ligands

“…2.14 Å for a Mg–C single bond) 19. A strong metal–carbon interaction is observed in the heteroleptic rhodium(III) complex, [Cp*Rh( 1b )][ClO 4 ], which has a substantial influence on the NMR parameters of the methanide carbon atom, as evidenced by the high‐field chemical shift and relatively small one‐bond C–P coupling constant { δ ( 13 C) = –33.5 [ 1 J ( 13 C, 31 P) = 39.6 Hz]} 7d. In contrast, the weak Mg ··· C interactions in Mg( 3a ) 2 and Mg( 3b ) 2 do not perturb these parameters significantly compared with the alkali‐metal or zinc complexes (see above).…”

Structural and Spectroscopic Studies of the PCP-Bridged Heavy Chalcogen-Centered Monoanions [HC(PPh2E)(PPh2)]− (E = Se, Te) and [HC(PR2E)2]− (E = Se, Te, R = Ph; E = Se, R = iPr): Homoleptic Group 12 Complexes and One-Electron Oxidation of [HC(PR2Se)2]−

“…The 1 H, 7 Li, 13 The X-band EPR spectra were recorded on a Bruker EMX 113 spectrometer equipped with a variable-temperature accessory.…”

“…The former are isoelectronic with the monochalcogenoimidodiphosphinate anions 1, while the dichalcogeno anions 8 are isoelectronic with the monoanions 2 and the dianion 4. A search of the Cambridge Crystallographic Database revealed only two complexes of 7 or 8: viz., the group 14 monoseleno compound {Ge[(Me 3 Si)C(PMe 2 )(PMe 2 Se)] 2 } 12 and the diseleno complex {Cp*Rh[HC(PPh 2 Se) 2 ]ClO 4 }, 13 in which the rhodium center is connected to the anionic PCP carbon. No solid-state structures of complexes of the tellurium-containing anions 7 and 8 (E=Te) or their neutral precursors have been reported.…”

“…Elemental analyses were performed by Analytical Services, Department of Chemistry, University of Calgary. 13 C spectra are referenced to the solvent signal and the chemical shifts are reported relative to (CH 3 ) 4 Si. 7 Li and 31 P NMR spectra are referenced externally, and the chemical shifts are reported relative to a 1.0 M solution of LiCl in D 2 O and to an 85% solution of H 3 PO 4 .…”

Chemistry of a Metallathiaborane Cluster. 5. Reaction of [8,8-(η2-dppm)-8-(η1-dppm)-nido-8,7-RhSB9H10] and Its Derivatives with Organotransition-Metal Reagents

“…PPh3 and dppe were obtained from Aldrich, dppm was obtained from Strem, and [Cp*RhCl2(η 1 -dppm)] was prepared from the reaction between [Cp*Rh(µ-Cl)2]2 and dppm as described in the literature. 32 NMR spectroscopy was carried out on a Bruker ARX 500 spectrometer operating at 500.1 MHz for proton, 160.5 MHz for boron-11, and 202.5 MHz for phosphorus-31. Chemical shifts are reported at 25 °C in ppm for CD2Cl2 solutions to low field (high frequency) of Et2O‚BF3 for 11 B, of SiMe4 for 1 H, and of 85% H3PO4 for 31 P. Elemental analyses were obtained from Atlantic Microlabs Inc., Norcross, GA. NMR spectra were run on all samples sent for mass spectra and crystal growth was generated from NMR samples, after spectral analysis.…”