TY - JOUR
T1 - Ruthenium bipyridyl compounds with two terminal alkynyl ligands
AU - Adams, Christopher J.
AU - Bowen, Lucy E.
AU - Humphrey, Mark G.
AU - Morrall, Joseph P.L.
AU - Samoc, Marek
AU - Yellowlees, Lesley J.
PY - 2004/12/21
Y1 - 2004/12/21
N2 - Compounds of the form Ru(X2bipy)(PPh3) 2(-C≡CC6H4NO2-p)2 (X2 bipy = 4,4′-X2-2,2′-bipyridine, X = Me 3a, Br 3b, I 3c) have been synthesised from the mono-alkynyl precursors Ru(X 2bipy)(PPh3)2(-C≡CC6H 4NO2-p)Cl (X = Me 2a, Br 2b, I 2c); the former are the first ruthenium bis-alkynyl compounds that also contain a bipyridyl ligand. Spectroelectrochemical investigation of 3a shows that the metal is readily oxidised to form the ruthenium(III) compound 3a+, and will also undergo a single-electron reduction at each nitro group to form 3a2-. ESR and UV/visible spectra of these redox congeners are presented. We also report the synthesis of [Ru(Me2bipy)(PPh3) 2-(-C≡CBu1)(N≡N)][PF6] 4 during the attempted synthesis of Ru(Me2bipy)(PPh3) 2(-C≡CBu1)2, and report its X-ray crystal structure and IR spectrum. X-Ray crystal structures of 3b and 3c (as two different solvates) are presented, and the nature of the inlermolecular interactions seen therein is discussed. Z-Scan measurements on Ru(Me 2bipy)(PPh3)2-(-C≡CR)Cl (R = C 6H4NO2-p 2a, But, Ph, C 6H4Me) are also reported, and show that Ru(Me 2bipy)(PPh3)2(-C≡CR)-Cl (R = C 6H4NO2-p 2a, Ph) exhibit moderate third-order non-linearities.
AB - Compounds of the form Ru(X2bipy)(PPh3) 2(-C≡CC6H4NO2-p)2 (X2 bipy = 4,4′-X2-2,2′-bipyridine, X = Me 3a, Br 3b, I 3c) have been synthesised from the mono-alkynyl precursors Ru(X 2bipy)(PPh3)2(-C≡CC6H 4NO2-p)Cl (X = Me 2a, Br 2b, I 2c); the former are the first ruthenium bis-alkynyl compounds that also contain a bipyridyl ligand. Spectroelectrochemical investigation of 3a shows that the metal is readily oxidised to form the ruthenium(III) compound 3a+, and will also undergo a single-electron reduction at each nitro group to form 3a2-. ESR and UV/visible spectra of these redox congeners are presented. We also report the synthesis of [Ru(Me2bipy)(PPh3) 2-(-C≡CBu1)(N≡N)][PF6] 4 during the attempted synthesis of Ru(Me2bipy)(PPh3) 2(-C≡CBu1)2, and report its X-ray crystal structure and IR spectrum. X-Ray crystal structures of 3b and 3c (as two different solvates) are presented, and the nature of the inlermolecular interactions seen therein is discussed. Z-Scan measurements on Ru(Me 2bipy)(PPh3)2-(-C≡CR)Cl (R = C 6H4NO2-p 2a, But, Ph, C 6H4Me) are also reported, and show that Ru(Me 2bipy)(PPh3)2(-C≡CR)-Cl (R = C 6H4NO2-p 2a, Ph) exhibit moderate third-order non-linearities.
UR - http://www.scopus.com/inward/record.url?scp=11144348135&partnerID=8YFLogxK
U2 - 10.1039/b411609g
DO - 10.1039/b411609g
M3 - Article
SN - 1477-9226
SP - 4130
EP - 4138
JO - Dalton Transactions
JF - Dalton Transactions
IS - 24
ER -