Synthetic, spectral and structural studies of ruthenium(II) compounds based on 2,6-diacetylpyridinemonoxime

• Published in: Journal of molecular structure 2008-08, Vol.886 (1), p.136-143
• Main Authors: Trivedi, Manoj, Singh, Sanjay K., Pandey, Daya S., Zou, Ru-Qiang, Chandra, Manish, Xu, Qiang
• Format: Article
• Language: English
• Subjects: dapmoH; Luminescence; Ruthenium; Tertiary phosphines; Weak interactions; X-ray
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2007.11.022

Reaction of the ruthenium complexes [RuCl 2(EPh 3) 3] (E = P, As), [( η 5-C 5H 5)RuCl(EPh 3) 2] (E = P, As), [( η 5-C 5Me 5)RuCl(PPh 3) 2] and [( η 5-C 9H 7)RuCl(PPh 3) 2] with 2,6-diacetylpyridinemonoxime (dapmoH) have been investigated. Compounds with the formulations [Ru( κ 3-dapmoH)Cl(PPh 3) 2]PF 6 ( 1), [Ru( κ 3-dapmoH)Cl(PPh 3) 2]BF 4 ( 2) and [Ru( κ 3-dapmoH)Cl(AsPh 3) 2]Cl ( 3) have been isolated and fully characterized by elemental analyses, IR, NMR, electronic, emission spectral and electrochemical studies. Molecular structures of the complexes [ Ru ( κ 3 -dapmoH ) Cl ( PPh 3 ) 2 ] PF 6 · H 2 O ( 1) and [ Ru ( κ 3 -dapmoH ) Cl ( PPh 3 ) 2 ] BF 4 · 1.5 H 2 O ( 2) have been determined by single crystal X-ray diffraction studies. A structural feature of interest for both the compounds is that the counter anions in 1 and 2 play vital role in the self-assembly of cages through intermolecular weak interactions in which water dimers or trimers are encapsulated. Compounds 1 and 2 strongly emit upon excitation at their respective MLCT transitions.