The First Carbodiphosphorane Complex with Two Palladium Centers Attached to the CDP Carbon: Assembly of a Single-Stranded di-Pd Helicate by the PCP Pincer ligand C(dppm)2

2011 ◽  
Vol 30 (15) ◽  
pp. 4220-4223 ◽  
Author(s):  
Christian Reitsamer ◽  
Walter Schuh ◽  
Holger Kopacka ◽  
Klaus Wurst ◽  
Ernst P. Ellmerer ◽  
...  
Keyword(s):  
Pincer Ligand ◽  
Pcp Pincer

A hexanuclear iridium complex with a novel binding mode of a PCP–pincer ligand

2004 ◽  
Vol 357 (10) ◽  
pp. 3014-3018 ◽  
Author(s):  
Xiawei Zhang ◽  
Thomas J Emge ◽  
Alan S Goldman
Keyword(s):  
Binding Mode ◽  
Iridium Complex ◽  
Pincer Ligand ◽  
Pcp Pincer

scholarly journals A Ruthenium(II) Complex Stabilized by a Highly Fluorinated PCP Pincer Ligand

2005 ◽  
Vol 24 (19) ◽  
pp. 4553-4557 ◽  
Author(s):  
Marcella Gagliardo ◽  
Preston A. Chase ◽  
Martin Lutz ◽  
Anthony L. Spek ◽  
Frantisek Hartl ◽  
...  
Keyword(s):  
Pincer Ligand ◽  
Pcp Pincer

scholarly journals Crystal structure of an iridium(III) complex of the [C(dppm)2] PCP pincer ligand system and its conjugate CH acid form

2018 ◽  
Vol 74 (5) ◽  
pp. 620-624 ◽  
Author(s):  
Christian Reitsamer ◽  
Inge Schlapp-Hackl ◽  
Gabriel Partl ◽  
Walter Schuh ◽  
Holger Kopacka ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Iridium Complexes ◽  
Pincer Ligand ◽  
Single Crystal Diffraction ◽  
Dalton Trans ◽  
Ligand System ◽  
Distorted Octahedral ◽  
Major Interest ◽  
Carbonyl Bond ◽  
Pcp Pincer

After the successful creation of the newly designed PCP carbodiphosphorane (CDP) ligand [Reitsamer et al. (2012). Dalton Trans. 41, 3503–3514; Stallinger et al. (2007). Chem. Commun. pp. 510–512], the treatment of this PCP pincer system with the transition metal iridium and further the analysis of the structures by single-crystal diffraction and by NMR spectroscopy were of major interest. Two different iridium complexes, namely (bis{[(diphenylphosphanyl)methyl]diphenylphosphanylidene}methane-κ3 P,C,P′)carbonylchloridohydridoiridium(III) chloride dichloromethane trisolvate, [IrIII(CO){C(dppm)2-κ3 P,C,P′}ClH]Cl·3CH2Cl2 (1) and the closely related (bis{[(diphenylphosphanyl)methyl]diphenylphosphanylidene}methanide(1+)-κ3 P,C,P′)carbonylchloridohydridoiridium(III) dichloride–hydrochloric acid–water (1/2/5.5), [IrIII(CO){CH(dppm)2-κ3 P,C,P′)ClH]Cl}2 (2), have been designed and both complexes show a slightly distorted octahedral coordinated IrIII centre. The PCP pincer ligand system is arranged in a meridional manner, the CO ligand is located trans to the central PCP carbon and a hydride and chloride are located perpendicular above and below the P2C2 plane. With an Ir—CCDP distance of 2.157 (5) Å, an Ir—CO distance of 1.891 (6) Å and a quite short C—O distance of 1.117 (7) Å, complex 1 presents a strong carbonyl bond. Complex 2, the corresponding CH acid of 1, shows an additionally attached proton at the carbodiphosphorane carbon atom located antiperiplanar to the hydride of the metal centre. In comparison with complex 1, the Ir—CCDP distance of 2.207 (3) Å is lengthened and the Ir—C—O values indicate a weaker trans influence of the central carbodiphosphorane carbon atom.

scholarly journals A PCP Pincer Ligand for Coordination Polymers with Versatile Chemical Reactivity: Selective Activation of CO2 Gas over CO Gas in the Solid State

2016 ◽  
Vol 128 (40) ◽  
pp. 12539-12543 ◽  
Author(s):  
Junpeng He ◽  
Nolan W. Waggoner ◽  
Samuel G. Dunning ◽  
Alexander Steiner ◽  
Vincent M. Lynch ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Polymers ◽  
Chemical Reactivity ◽  
Pincer Ligand ◽  
Selective Activation ◽  
Co2 Gas ◽  
Pcp Pincer ◽  
Co Gas

Selective hydration of nitriles to amides catalysed by PCP pincer supported nickel(ii) complexes

2015 ◽  
Vol 44 (27) ◽  
pp. 12082-12085 ◽  
Author(s):  
J. Borau-Garcia ◽  
D. V. Gutsulyak ◽  
R. J. Burford ◽  
W. E. Piers
Keyword(s):  
Pincer Ligand ◽  
Mild Conditions ◽  
Pcp Pincer

Nickel(ii) hydroxo compounds supported by an electron rich PCP pincer ligand are active catalysts for the selective hydration of a variety of nitriles at low catalyst loadings and mild conditions.

Synthesis and Molecular Structure of a Perfluoroalkyl Complex of Platinum Containing a PCP Pincer Ligand

2001 ◽  
Vol 20 (22) ◽  
pp. 4741-4744 ◽  
Author(s):  
Russell P. Hughes ◽  
Alex Williamson ◽  
Christopher D. Incarvito ◽  
Arnold L. Rheingold
Keyword(s):  
Molecular Structure ◽  
Pincer Ligand ◽  
Pcp Pincer

Synthesis and reactivity of a ferrocene-derived PCP-pincer ligand

2002 ◽  
pp. 308-309 ◽  
Author(s):  
Edward J. Farrington ◽  
Eloisa Martinez Viviente ◽  
B. Scott Williams ◽  
Gerard van Koten ◽  
John M. Brown
Keyword(s):  
Pincer Ligand ◽  
Pcp Pincer

scholarly journals Crystal structures of four new iridium complexes, each containing a highly flexible carbodiphosphorane PCP pincer ligand

2018 ◽  
Vol 74 (6) ◽  
pp. 846-852 ◽  
Author(s):  
Gabriel Julian Partl ◽  
Felix Nussbaumer ◽  
Inge Schlapp-Hackl ◽  
Walter Schuh ◽  
Holger Kopacka ◽  
...  
Keyword(s):  
Double Bond ◽  
Ethyl Acetate ◽  
Crystal Structures ◽  
Complex Cation ◽  
Iridium Complexes ◽  
Pincer Ligand ◽  
Coordination Sites ◽  
Trigonal Bipyramidal ◽  
Pcp Pincer ◽  
Chloride Pentahydrate

Compound [Ir(C8H12)(C51H45P4)]Cl2or [Ir(cod)(CH(dppm)2-κ3P,C,P)]Cl2(1a), was obtained from [IrCl(cod)]2and the carbodiphosphorane (CDP) salt [CH(dppm)2]Cl [where cod = cycloocta-1,5-diene and dppm = bis(diphenylphosphino)methane]. Treatment of1awith thallium(I) trifluoromethanesulfonate [Tl(OTf)] and subsequent crystallization gave complex [Ir(C8H12)(C51H45P4)](OTf)2·CH3CO2C2H5·CH2Cl2or [Ir(cod)(CH(dppm)2-κ3P,C,P)](OTf)2·CH3CO2C2H5·CH2Cl2(1b) [systematic name: (cycloocta-1,5-diene)(1,1,3,3,5,5,7,7-octaphenyl-1,7-diphospha-3,5-diphosphoniaheptan-4-yl)iridium(I) bis(trifluoromethanesulfonate)–ethyl acetate–dichloromethane (1/1/1)]. This five-coordinate iridium(I) complex cation adopts a trigonal–bipyramidal geometry with the CDP carbon and one cod double bond in axial sites. Compound1brepresents the first example of a non-meridionalcoordination of the PCP pincer ligand [CH(dppm)2]+with a P—Ir—P angle of 98.08 (2)°. Compound2, [IrCl2H(C51H44P4)]·(CH3)2CO or [IrCl2H(C(dppm)2-κ3P,C,P)]·(CH3)2CO [systematic name: dichloridohydrido(1,1,3,3,5,5,7,7-octaphenyl-1,5λ5,7-triphospha-3-phosphoniahept-4-en-4-yl)iridium(III) acetone monosolvate], crystallizes as an acetone monosolvate. It is a six-coordinate IrIIIcoordination compound. Here, the PCP pincer ligand is coordinated in ameridionalmanner; one chlorido ligand is positionedtransto the carbon donor, the remaining two coordination sites being occupied by the second chlorido and a hydrido ligandtransto each other. Complex3, [IrCl2H(C51H45P4)]Cl·5H2O or [IrCl2H(CH(dppm)2-κ3P,C,P)]Cl·5H2O [systematic name: dichloridohydrido(1,1,3,3,5,5,7,7-octaphenyl-1,7-diphospha-3,5-diphosphoniaheptan-4-yl)iridium(III) chloride pentahydrate], represents the conjugate CH acid of2. The ligand [CH(dppm)2]+is coordinated in ameridionalmanner. In the cationic six-coordinate IrIIIcomplex4, [IrClH(CO)(C51H44P4)]Cl·2CH3OH·H2O or [IrClH(CO)(C(dppm)2-κ3P,C,P)]Cl·2CH3OH·H2O [systematic name: carbonylchloridohydrido(1,1,3,3,5,5,7,7-octaphenyl-1,5λ5,7-triphospha-3-phosphoniahept-4-en-4-yl)iridium(III) chloride–methanol–water (1/2/1)], the chlorido ligand is found in the plane defined by the Ir center and themeridionalPCP ligand; the H and CO ligands are positioned axially to this plane andtransto each other.

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