67471-62-9

Upstream product

• 2622-14-2 tricyclohexylphosphine 
• 931-51-1 cyclohexylmagnesiumchloride 
• 931-50-0 cyclohexylmagnesium bromide 
• 13689-19-5 tricyclohexylphosphine oxide 
• 56-23-5 tetrachloromethane 

Downstream Products

• 2622-14-2 tricyclohexylphosphine 

Relevant academic research and scientific papers

A strong organic electron donor incorporating highly π-donating triphenylphosphonium ylidyl substituents

The π-electron donor strength of a triphenylphosphonium ylidyl group (Ph3PCH-) was explored through its substitution onto a bispyridinylidene (BPY) scaffold. Electrochemical studies revealed that the new triphenylphosphonium ylidyl-substituted BPY is the most reducing di-substituted derivative reported to date (E1/2 = -1.55 V vs. SCE). By using a previously established correlation between the redox potential of the substituted BPYs and the corresponding substituent, a Hammett constant for the Ph3PCH- group was determined (σp+ = -2.33), establishing it as the most donating neutral substituent currently quantified. The BPY is readily oxidized by hexachloroethane to produce the corresponding dicationic bipyridinium salt as a mixture of isomers owing to hindered Cylidyl-Cpyridyl bond rotation. In preliminary tests of the BPY as a reductant, dichlorotricyclohexylphosphorane and chlorodiphenylphosphine were reduced to the corresponding phosphine and diphosphine, respectively.

An unexpected formation of a Ru(III) benzylidene complex during activation of a LatMet-type ring-opening polymerisation catalyst

Upon activation with C2Cl6 known latent Ru metathesis catalyst LatMet (13) exhibited activity in RCM and in ROMP of DCPD. A by-product of such activation, an aryloxybenzylidene ruthenium(III) complex 17 have been independently synthesised by reacting 13 with C2Cl6. This unique complex was characterised by spectroscopic and electrochemical methods, and by X-ray crystallography. To the best to our knowledge, this is the first isolated and structurally determined Ru(III) alkylidene complex reported.

The Phosphonium Ion [Cy3PCHCl2]+: Synthesis and Properties

The synthetic pathway to the functional phosphonium cation [Cy3PCHCl2]+ (3) has been evaluated by using in situ 31P NMR spectroscopy and mass spectrometry. The synthesis is only successful if CCl4/CHCl3 mixtures are used. A mechanism for the varying reactivity in different solvents is given as well as a mechanism for the observed equilibrium between ions [Cy3PCHCl2]+ and [Cy3PCH2Cl]+ (12). Through the anticipated hydrogen bonding interaction between [Cy3PCHCl2]+ and the corresponding anion, crystal structures of the compounds [Cy3PCHCl2]Cl·2CHCl3 (3a) and [Cy3PCHCl2]3[H3O][H5O2]Cl5·C6D6 (3b) could be obtained and evaluated.

Class of olefin metathesis catalysts, methods of preparation, and processes for the use thereof

This invention relates to a metathesis catalyst comprising (i) a Group 8 metal hydride-dihydrogen complex represented by the formula: wherein M is a Group 8 metal; X is an anionic ligand; and L1 and L2 are neutral donor ligands; and (ii) a ligand exchange agent represented by the formula J-Y, wherein J is selected from the group consisting of hydrogen, a C1 to C30 hydrocarbyl, and a C1 to C30 substituted hydrocarbyl; and Y is selected from the group consisting of halides, alkoxides, aryloxides, and alkyl sulfonates.

METHOD FOR SYNTHESIZING CYCLOHEXYL-SUBSTITUTED PHOSPHINES

The present invention relates to a process for preparing cyclohexyl-substituted phosphines. The invention further relates to a process for preparing cyclohexyl-substituted phosphine oxides which can be used as intermediates in the preparation of cyclohexyl-substituted phosphines.

Structure of R3PCl2 compounds in the solid state and in solution: Dependency of structure on R. Crystal structures of trigonal bipyramidal (C6F5)3PCl2, Ph2(C6F5)PCl2 and of ionic Prn3PCl2

A number of triorganophosphorus dichloride compounds R3PCl2, (R3 = substituted aryl, mixed aryl-alkyl or triaryl) have been synthesized from diethyl ether solution and characterised by analytical and 31P-{1H} NMR data in CDCl3 solution. The majority of the compounds are ionic, [R3PCl]Cl, in CDCl3 solution, in keeping with analogous species containing the heavier halogens [R3PX]X (X = Br or I), according to 31P-{1H} NMR studies. In contrast, the compounds R3PCl2 [R3 = (C6F5)3 or (C6F5)Ph2] have a molecular five-co-ordinate trigonalbipyramidal structure both in CDCl3 solution and in the solid state. The crystal structures of these two compounds have been determined and represent the only crystallographic studies of trigonal-bipyramidal compounds of stoichiometry R3PCl2. The compound (C6F5)3PCl2 exhibits almost perfect trigonal-bipyramidal geometry, whereas (C6F5)Ph2PCl2 shows significant distortion. This may be due to the asymmetry of the equatorial groups around the phosphorus atom. Why R3PCl2 [R3 = (C6F5)3 or (C6F5)Ph2] adopt a trigonal-bipyramidal structure is reasoned to be due to the acidity of the parent tertiary phosphines, which favours this geometry for the dihalogen adducts, a phenomenon previously observed for dihalogen adducts of tertiary arsines. The crystal structure of Prn3PCl2, the first crystallographically characterised example of an ionic R3PCl2 compound which does not contain a solvent molecule, has been found to contain two Prn3PCl2 entities. The first consists of an ionic [Prn3PCl]+ unit weakly linked by a long Cl ... Cl contact to a Cl-, d(Cl ... Cl) 3.207(3) A. The second shows a discrete [Prn3PCl]+ cation, the Cl- anion being associated with δ+ H atoms on a [Prn3PCl]+ moiety. This compound was prepared and crystallised from diethyl ether and its relation to the solvated complex [Ph3PCl ... Cl ... ClPPh3]Cl·CH2Cl2 is discussed.