Dynamics of H-atom exchange in stable cis-dihydrogen/hydride complexes of ruthenium( II) bearing phosphine and N-N bidentate ligands


Autoria(s): Bera, Barun; Patil, Yogesh P; Nethaji, Munirathinam; Jagirdar, Balaji R
Data(s)

2014

Resumo

Synthesis and characterization of cis, trans-RuH(eta(2)-H-2)(PPh3)(2)(N-N)]OTf] (N-N = 2,2'-bipyridyl (bpy) 1a, 2,2'-bipyrimidine (bpm) 2a; OTf = trifluoromethane sulfonate (CF3SO3)) complexes are reported. The cis-H-2/hydride ligands are involved in H-atom site exchange between the two moieties. This dynamics was investigated by variable temperature NMR spectral studies based on which the mechanism of the exchange process was deduced. The Delta G(#) for the exchange of H-atoms between the eta(2)-H-2 and hydride ligands was determined to be around 8 and 13 kJ mol(-1), respectively, for 1a and 2a. The H-H distances (d(HH), A) in complexes 1a and 2a have been calculated from the T-1(minimum) and (1)J(H, D) and are found to be 1.07 A (slow) and 0.95 A for 1a and 1.04 A (slow) and 0.94 A for 2a, respectively. The molecular structure of 1a was determined by X-ray crystallography.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/48925/1/dal_tra_43-12_4726_2014.pdf

Bera, Barun and Patil, Yogesh P and Nethaji, Munirathinam and Jagirdar, Balaji R (2014) Dynamics of H-atom exchange in stable cis-dihydrogen/hydride complexes of ruthenium( II) bearing phosphine and N-N bidentate ligands. In: DALTON TRANSACTIONS, 43 (12). pp. 4726-4733.

Publicador

ROYAL SOC CHEMISTRY

Relação

http://dx.doi.org/10.1039/c3dt52575a

http://eprints.iisc.ernet.in/48925/

Palavras-Chave #Inorganic & Physical Chemistry
Tipo

Journal Article

PeerReviewed