The electronic structure of [Ru(bpy) 2 (OQN)] + (where bpy = 2,2Ј-bipyridine and OQN = 8-oxyquinolate) has been revisited using a complimentary suite of theoretical (DFT/TD-DFT), electrochemical (cyclic voltammetry) and spectroscopic techniques (UV/Vis/NIR absorption, EPR spectroscopy). Through functionalization of the R-OQN ligand (R = 2-Me; 5,7-Me 2 ; 5-F; 5-Cl; 5,7-Cl 2 ; 5-NO 2 ) charge delocalization across the non-innocent ruthenium-oxyquinolate framework has been investigated and correlated with substituent Hammett parameters. Combined spectroscopic and computational studies indicate substantial mixing at the [a]

Synthesis and characterization of the dimeric [fac-Re(R-OQN)(CO) 3 ] 2 and monomeric fac-Re(R-OQN)-(CO) 3 (CH 3 CN) complexes are reported where R = unsubstituted, 2-methyl, 5,7-dimethyl, or 5-fluoro and OQN = 8oxyquinolate. Facile solvolysis of the dimeric systems is observed in coordinating media quantitatively yielding the monomer complexes in situ. Due to poor synthetic yields of the dimeric precursors, a direct synthetic strategy for isolation of the acetonitrile monomer complexes with an improved yield was developed. The fac-Re(CH 3 CN) 2 (CO) 3 Cl complex was easily generated in situ as a convenient intermediate to give the desired products in quantitative yield via reaction with the appropriately substituted 8-hydroxyquinoline and tetramethylammonium hydroxide base. Key to the success of this reaction is the precipitation of the product with triflic acid, whose conjugate triflate base is here noncoordinating. Furthermore, isolation of the solvated single crystal [fac-Re(FOQN)(CO) 3 ](μ-Cl)[fac-Re(FHOQN)(CO) 3 ]•CH 3 C 6 H 5 has allowed a unique opportunity to access a possible reaction intermediate, giving insight into the formation of the [fac-Re(R-OQN)(CO) 3 ] 2 dimeric systems. Spectroscopic features (UV−vis, FTIR, and 1 H NMR) of both monomeric and dimeric structures are discussed in terms of the π-electron-donating ability of the oxyquinolate ligand. Interpretation of these electronic effects and the associated steric properties is aided by single-crystal X-ray diffraction, electrochemical, and DFT/TD-DFT computational studies.

A genetic analysis of twins at school was undertaken using as variables urinary concentrations of kallikrein, catecholamines, sodium and potassium which have been demonstrated to be associated with blood pressure levels. In addition to these variables, urinary concentrations of urea nitrogen and inorganic sulfate sulfur which are indices of protein intake were investigated. 35 pairs of monozygotic twins and 19 pairs of dizygotic twins aged from 6 to 14 years were examined. Variance and correlation tests for genetic analysis indicated that in school children, hereditary factors play a role in the control of urinary potassium, sodium and kallikrein excretion. However, with regard to the urinary excretion of catecholamines, urea nitrogen and inorganic sulfate sulfur, hereditary control is not so apparent.