Synthesis and structural features of complexes [(P∩P)2Rh][hfacac] containing hexafluoroacetyl- acetonate as a noncoordinating anion

2001 ◽  
Vol 79 (5-6) ◽  
pp. 642-648
Author(s):  
Roland Fornika ◽  
Christian Six ◽  
Helmar Görls ◽  
Magnus Kessler ◽  
Carl Krüger ◽  
...  
Keyword(s):  
Structural Features ◽  
Phosphine Ligand ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Phosphorus Ligands ◽  
Space Groups ◽  
Symmetric Chains ◽  
Square Planar ◽  
Bidentate Phosphine ◽  
Bidentate Phosphine Ligand

The synthesis and characterization of complexes [(P∩P)2Rh][hfacac] (P∩P = chelating bidentate phosphine ligand R2P(CH2)nPR2 (2a-g), hfacac = hexafluoroacetylacetonate anion) (4) is reported. The molecular structures of 4a (R = Ph, n = 1) and 4f (R = Cy, n = 2) in the solid state were determined by single-crystal X-ray diffraction. The complexes crystallize in the monoclinic space groups C2/c (No. 15) and P21/n (No. 14), respectively. No coordinative interaction between the rhodium center of the cation [(P∩P)2Rh]+ (4a+, 4f+) and the hfacac anion is evident in either cases. In the crystal structure of 4a, hydrogen bonds between the oxygen atoms of the hfacac anion and methylene protons of the CH2 bridges of the phosphine ligand lead to highly symmetric chains of regularly alternating cations and anions. The coordination geometry around the rhodium center in 4a+ is ideally square-planar, whereas 4f+ is significantly distorted towards a tetrahedron with an angle between the two P2Rh moieties of 18.6°. The cation 4b+ (R = Cy, n = 1) was investigated in form of the tetrafluoroborate salt for comparison. The compound [{Cy2P(CH2)PCy2}2Rh][BF4] crystallizes as a THF solvate (4b′) in the triclinic space group P[Formula: see text] (No. 2) containing ideally square-planar [(P∩P)2Rh]+ cations. Key words: rhodium, chelating ligands, coordination modes, 1,3-diketonates, phosphorus ligands.

Effects of a Bidentate Phosphine Ligand on Palladium-Catalyzed Nucleophilic Substitution Reactions of Propargyl and Allyl Halides with Thiol

2003 ◽  
Vol 22 (14) ◽  
pp. 2996-2999 ◽  
Author(s):  
Ken Tsutsumi ◽  
Tomomi Yabukami ◽  
Kouji Fujimoto ◽  
Tomohiro Kawase ◽  
Tsumoru Morimoto ◽  
...  
Keyword(s):  
Nucleophilic Substitution ◽  
Phosphine Ligand ◽  
Substitution Reactions ◽  
Nucleophilic Substitution Reactions ◽  
Allyl Halides ◽  
Palladium Catalyzed ◽  
Bidentate Phosphine ◽  
Bidentate Phosphine Ligand

Supramolecular bidentate phosphine ligand scaffolds from deconstructed Hamilton receptors

2017 ◽  
Vol 53 (3) ◽  
pp. 561-564 ◽  
Author(s):  
Daniel T. Seidenkranz ◽  
Jacqueline M. McGrath ◽  
Lev N. Zakharov ◽  
Michael D. Pluth
Keyword(s):  
Self Assembly ◽  
Phosphine Ligand ◽  
Bidentate Phosphine ◽  
Ligand Scaffolds ◽  
Bidentate Phosphine Ligand

The metal-assisted self-assembly of a phosphine-modified, deconstructed Hamilton receptor is reported as a new supramolecular ligand scaffold.

P–N bond formation as a route to a highly electron rich bidentate phosphine ligand and its application in homogenous catalysis

2001 ◽  
pp. 969-971 ◽  
Author(s):  
Mireia Rodriguez i Zubiri ◽  
Matthew L. Clarke ◽  
Douglas F. Foster ◽  
David J. Cole-Hamilton ◽  
Alexandra M. Z. Slawin ◽  
...  
Keyword(s):  
Bond Formation ◽  
Phosphine Ligand ◽  
Homogenous Catalysis ◽  
Bidentate Phosphine ◽  
Bidentate Phosphine Ligand

Molecular Recognition in a Palladium Complex Promoted Asymmetric Synthesis of aP-Chiral Heterodifunctionalized Bidentate Phosphine Ligand

1999 ◽  
Vol 18 (4) ◽  
pp. 650-655 ◽  
Author(s):  
Yongcheng Song ◽  
Jagadese J. Vittal ◽  
Soh-Ha Chan ◽  
Pak-Hing Leung
Keyword(s):  
Molecular Recognition ◽  
Asymmetric Synthesis ◽  
Palladium Complex ◽  
Phosphine Ligand ◽  
Bidentate Phosphine ◽  
Bidentate Phosphine Ligand

The Crystal and Molecular Structure of Pentane-2,4-dionato-(2,3,5,6-tetrahepto-2,3-dicarbomethoxo[2.2.1]bicycloheptadiene)rhodium(I), Rh(C5H7O2) (C7H6(CO2CH3)2)

1975 ◽  
Vol 53 (18) ◽  
pp. 2707-2713 ◽  
Author(s):  
Debbie Allen ◽  
Colin James Lyne Lock ◽  
Graham Turner ◽  
John Powell
Keyword(s):  
Crystal And Molecular Structure ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
Intensity Data ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Square Planar ◽  
Rhodium Atom

The crystal and molecular structures of pentane-2,4-dionato-(2,3,5,6-tetrahapto-2,3-dicarbomethoxo[2.2.1]bicycloheptadienerhodium(I), Rh(C5H7O2)(C7H6(CO2CH3)2), have been measured by single crystal X-ray diffraction. The orange crystals are monoclinic, space group P21/c, Z = 4, a = 9.245(4), b = 9.003(4), c = 21.680(15) Å, β = 113.41(5)°. The calculated and observed densities are 1.645 and 1.642(5) respectively. Intensity data were collected on a Syntex [Formula: see text] diffractometer and a full matrix least squares refinement on 3010 observed reflections leads to a conventional R = 0.0660. The structure can be considered as a roughly square planar arrangement of ligands around the rhodium atom composed of two β-ketoenolate oxygen atoms (Rh—O, 2.037(5) and 2.025(5) Å ) and the centers of the two ethylenic groups. The Rh—C distances for the olefin group attached to the two carbomethoxo groups, 2.117(8), 2.108(8) Å, appear to be slightly larger than those for the other olefinic group, 2.087(7), 2.082(6), and the corresponding C=C distances of 1.375(10) and 1.410(9) Å are different at the 95% confidence level.

A new strategy to synthesize three-coordinate mononuclear copper(i) halide complexes containing a bulky terphenyl bidentate phosphine ligand and their luminescent properties

2019 ◽  
Vol 43 (8) ◽  
pp. 3390-3399 ◽  
Author(s):  
Li-Ping Liu ◽  
Rui Zhang ◽  
Li Liu ◽  
Xin-Xin Zhong ◽  
Fa-Bao Li ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Green Emission ◽  
Luminescent Properties ◽  
Phosphine Ligand ◽  
New Strategy ◽  
Bidentate Phosphine ◽  
Halide Complexes ◽  
Bidentate Phosphine Ligand

Three mononuclear three-coordinate Cu(i) halide complexes were synthesized by a new strategy and they exhibit green to yellow green emission in the solid state at room temperature.

[1,3-Bis(diphenylphosphino)propane]tetracarbonylchromium(0)

2006 ◽  
Vol 62 (5) ◽  
pp. m1086-m1087 ◽  
Author(s):  
Omar bin Shawkataly ◽  
Shahinoor Dulal Islam ◽  
Hoong-Kun Fun ◽  
Claude Didierjean
Keyword(s):  
Phosphine Ligand ◽  
Carbonyl Ligands ◽  
Bond Lengths ◽  
Bidentate Phosphine ◽  
Title Molecule ◽  
Bidentate Phosphine Ligand

In the title molecule, [Cr(C27H26P2)(CO)4], the Cr atom is octahedrally coordinated by the four carbonyl ligands and a bidentate phosphine ligand, which is bonded as a chelate in a cis position. The average Cr—P and Cr—C bond lengths are 2.3770 (5) and 1.865 (2) Å, respectively.

Syntheses and molecular structures of some di(amidino)monosilanes

2021 ◽  
Vol 44 (1) ◽  
pp. 228-238
Author(s):  
Markus Bös ◽  
Marcus Herbig ◽  
Uwe Böhme ◽  
Edwin Kroke
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystal ◽  
High Field ◽  
Structural Features ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Field Shift ◽  
Nmr Signals

Abstract The syntheses of three different amidinosilanes of the type Me2Si[N=C(Ph)R]2 with R = pyrrolidino, morpholino, and diethylamino and one derivative with the composition R2Si[N=C(Ph)R]2 with R = morpholino are reported. These compounds were prepared in one-pot syntheses including three consecutive steps. All products are analysed by single crystal X-ray diffraction, NMR, and Raman spectroscopy. The Si–N=C–N units of these compounds show characteristic structural features and cause a significant high field shift of the 29Si NMR signals.

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