Ben P. Patel

EFFECTS OF DIHYDROGEN BONDING ON FLUXIONALITY IN REH5(PPH3)2L

Abstract Hydride fluxionality in ReH 5 (PPh 3 ) 2 L ( 2 , L = N -acetyl-2-aminopyridine) is affected by intramolecular Re-HH-N dihydrogen bonding.

Re–H⋯H–N interactions in the second-coordination sphere of crystalline [Re(PPh3)2(imidazole)]

The generality of intermolecular N–H⋯H–Re hydrogen bonding is demonstrated in the crystal structure of the title complex, in which an imidazole of crystallization is involved in a three-centre hydrogen bond with an ReH2 group.

Heterolytic dihydrogen activation in an iridium complex with a pendant basic group

Experimental and theoretical studies show that H2 reacts with an Ir phosphine complex having a basic pendant amino group to give either an H2 or an Ir–H···H–N hydrogen-bonded hydride complex, depending on the basicity of the phosphine ligands.

d0 and d2 Polyhydrides as unconventional proton acceptors in lntermolecular hydrogen bonding

Intermolecular hydrogen bonds form between a variety of weak proton acids such as indole and 2,4,6-Me3C6H2OH and the transition-metal hydrides [ReH5(PPh3)3], [ReH7(Ph2PCH2CH2PPh2)] and [WH4(PMePh2)4]; the strengths of the hydrogen-bond interactions are compared by IR data.