
TY  - JOUR
A1  - Moritz, PS 
A1  - Diamantis, AA 
A1  - Keene, FR 
A1  - Snow, MR 
A1  - Tiekink, ERT 
T1  - Synthetic and Characterization Studies of the Complexes [Ru(NH<sub>3</sub>)<sub>3</sub>(2-Pyridyl; X = N, COH, CH, P), and the X-Ray Crystal Structure of [Ru(NH<sub>3</sub>)<sub>3</sub>(Py<sub>3</sub>COH)]Br<sub>2</sub>.H<sub>2</sub>O
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1988
VL  - 41
IS  - 9
SP  - 1353
EP  - 1362
KW  - 
UR  - https://doi.org/10.1071/CH9881353 
N2  - Reaction of molar ratios of the ligands tri(2-pyridyl)amine (Py3N), or tri(2-pyridyl)-methanol (Py3COH) with [ Ru (NH3)3(OH2)3]2+ in aqueous solution produces the respective [ Ru (NH3)3(tripod)]2+ complexes. The analogous reaction with tri(2-pyridyl)methane (Py3CH) yields [ Ru (NH3)2(OH2)(Py3CH)]2+, while the reaction with the tri(2-pyridyl ) phosphine ligand produces several (unidentified) species. The N- and CH-bridged ligands appear coordinated in a tripodal manner through the three pyridine-N atoms of the ligand , whereas tri(2- pyridyl )-methanol is coordinated in an N,N&#8242;,O mode through two pyridine-N atoms and the hydroxy group of the bridge. The X-ray crystal structure of [ Ru (NH3)3(Py3COH)]Br2.H2O confirms this assignment: the complex of formula C16H24Br2N6O2Ru is monoclinic, space group P21/c, with cell dimensions a 13.916(6), b 10.300(2), c 15.910(7)&#506;, &#946; 111.90(3)&#176;, and Z 4. Full-matrix least-squares refinement on 2062 reflections with 1 &#8805; 2.5&#963;(I) converged to final R 0.030 and Rw 0.035. The coordinated OH group in the complex has a pKa of 6.5(±0.1) at 25&#176;C (aqueous 0.1 mol dm-3 KNO3). 
ER  -

