A series of new dicationic dihydrogen complexes of ruthenium of the type cis-[(dppm)2Ru(η-H2)(L)][BF4]2 (dppm = Ph2PCH2PPh2; L = phosphite) have been prepared by protonating the precursor hydride complexes cis[(dppm)2Ru(H)(L)][BF4] using HBF4•Et2O. The precursor hydride complexes have been obtained from trans-[(dppm)2Ru(H)(L)][BF4] (L = phosphite) via a rare acidcatalysed isomerization reaction...

The reaction of (trimethylsilyl)acetylene with the phosphinito phosphanido Pt(I) complex [(PHCy2)Pt(μ-PCy2){κ2P,O-μ-P(O)Cy2}Pt(PHCy2)](Pt-Pt) (1) results in the protonation of the Pt-Pt bond with the formation of the bridging hydride complex [(PHCy2)(Me3SiC≡C)Pt(μ-PCy2)(μ-H) Pt(PHCy2){κP-P(O)Cy2}](Pt-Pt) (2), which was characterized by spectroscopic, spectrometric and XRD analyses. Complex 2 ex...

Enantiomerically pure (1R,1′R)-1,3-bis[1-(diphenylphosphino)ethyl]benzene (4) has been obtained for the first time. The key step involves in situ tosylation of chiral (1S,1′S)-dimethyl1,3-benzenedimethanol (6) followed by nucleophilic attack with LiPPh2(BH3) to give [(1R,1′R)1,3-bis[1-(diphenylphosphino)ethyl]benzene]-bisborane (7). The bisborane-protected phosphine can be easily handled and pu...

A MHC6 complex of a platinum group metal with a capped octahedral arrangement of donor atoms around the metal center has been characterized. This osmium compound OsH{κ(2) -C,C-(PhBIm-C6 H4 )}3 , which reacts with HBF4 to afford the 14 e(-) species [Os{κ(2) -C,C-(PhBIm-C6 H4 )}(Ph2 BIm)2 ]BF4 stabilized by two agostic interactions, has been obtained by reaction of OsH6 (PiPr3 )2 with N,N'-diphen...

While numerous phenoxazine-based small molecules developed for organic electronic devices, very limited attention has been received on synthesized conjugated polymers containing this phenoxazine. Herein, we designed and two new low-bandgap donor−acceptor copolymers based phenoxazine with different side chains diketopyrrolopyrrole by Pd-catalyzed direct (hetero)arylation polycondensation using a...

Intermolecular hydroamination or hydroarylation reactions of norbornene and cyclohexadiene performed with catalytic amounts of Brönsted or Lewis acid in ionic liquids were found to provide higher selectivity and yields than those performed in classical organic solvents. The ionic liquid increases the acidity of the media and stabilizes ionic intermediates through the formation of supramolecular...

The proton catalyzed reaction of methyldiazoacetate and benzaldehyde resulting in the formation of b-ketoesters and 3-hydroxyacrylates has been investigated by means of DFT/B3LYP calculations. Experimentally this reaction is performed using HBF4 Et2O as the catalyst and CH2Cl2 as the solvent. Several mechanistic pathways involving 1,2-migration of phenyl-, H-, and OH-substituents have been cons...

Molybdenum and tungsten complexes M(h-C5H4CH2-h-CH2)(CO)3 (M=Mo, W) containing the bidentate ethyl-functionalized cyclopentadienyl ligand C5H4CH2CH2 have been synthesized by the reaction of spiro[2.4]hepta-4,6-diene with M(CO)3L3 (M=Mo; L3=1,3,5-C6H3Me3; M=W; L=NCMe). Reaction of the more stable tungsten complex with C6H5ICl2 and HBF4 gave complexes of the type W(h-C5H4CH2CH2Cl)(CO)3Cl, W(h-C5H...

Sterically hindered olefins are efficiently reduced to the corresponding alkanes by the boranemethyl sulfide (BMS) complex at room temperature (or below) in dichloromethane containing a mild one-electron oxidant (such as an aromatic cation radical) or by the passage of an anodic current. In an alternative procedure, the hydrogenation of the same (electron-rich) olefins with the BMS complex (in ...