Reactions of Dipyridylketone With Group 8 Metal Carbonyls in Different Media

Abstract

Reaction of di-(2-pyridyl)ketone (dpk) with [M 3 (CO) 12 ], M =Ru or Os in dioxan under reduced pressure gave the tricarbonyl derivative [Ru(CO) 3 (dpk)] (1) and [Os(CO) 3 (dpk)] (2). When these reactions were carried out in benzene/ethanol 1:1 (v:v) under reflux and reduced pressure gave the binuclear ruthenium complex [Ru 2 (CO) 4 (-CO)( 3 -dpkO,Oeth) 2 ] (3), where  3 -dpkO,Oeth is N,O,N-ethoxybis(2-pyridyl)-methanolato and the mononuclear [Os(CO) 3 ( 3 -dpkO,Oeth) (4). All complexes were characterized by elemental analysis, infrared, mass and 1 H NMR spectroscopy. The spectroscopic measurements indicated that in dioxane as solvent the dpk act as bidentate ligand while in benzene/ethanol solution the dpk act as tridentate ligand. The magnetic measurements revealed that the complexes (3) and (4) are paramagnetic with change in the formal oxidation state of the ruthenium and osmium atoms from zero to +1 via oxidative addition of the OH group to ruthenium or osmium with a proton displacement to give a low-spin d 7 electronic configuration The UV-Vis studies of the complexes showed blue shift compared to the ligand confirming complex formation.

Medication adherence and health belief model among hypertensive patients attending rural health centres of a tertiary care hospital in South India

“…Almost identical adherence was reported in a study conducted by Venkatachalam et al (24%) in India but was higher in other studies reported from Malaysia (44%) and Egypt (72%) which could be due to different socio demographic profile. 3,20,21 While a community based study also showed a prevalence of 59%. 17 In our study, adherence was higher among people in the age group above 60 years (24.5%), females (28%) compared to males and among married (26.9%) than widow/er.…”