geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Preparation, structure characterization, and oxidation activity of ruthenium complexes with tripodal ligands bearing noncovalent interaction sites


, : Preparation, structure characterization, and oxidation activity of ruthenium complexes with tripodal ligands bearing noncovalent interaction sites. Inorganic Chemistry 43(25): 8119-8129

Ruthenium(II/III) complexes with tripodal tris(pyridylmethyl)amine ligands bearing one, two, or three pivalamide groups (MPPA, BPPA, TPPA: amide-series ligands) or neopentylamine ones (MNPA, BNPA, TNPA: amine-series ligands) at the 6-position of the pyridine ring have been synthesized and structurally characterized. The X-ray structure analyses of the single crystals of these complexes reveal that they complete an octahedral geometry with the tripodal ligand and some monodentate ligands. The amide-series ligands prefer to form a Ru(II) complex, while the amine-series ones give a Ru(III) complex. In the presence of PhIO oxidant, the catalytic activities for epoxidation of olefins, hydroxylation of alkane, and dehydrogenation of alcohol have been investigated using the six ruthenium complexes [Ru(II)(tppa)Cl(2)] (1), [Ru(III)(tnpa)Cl(2)]PF(6) (2), [Ru(II)(bppa)Cl]PF(6) (3), [Ru(III)(bnpa)Cl(2)]PF(6) (4), [Ru(II)(mppa)Cl]PF(6) (5), and [Ru(III)(mnpa)Cl(2)]PF(6) (6). Among them, the amide-series complexes, 1, 3, and 5, showed a higher epoxidation activity in comparison with the amine-series ones, 2, 4, and 6. On the other hand, the latter showed a higher reactivity for hydroxylation, allylic oxidation, and C=C bond cleavage reactions compared with the former. Such a complementary reactivity is interpreted by the character of the ruthenium-oxo species involving electronically equivalent formulas, Ru(V)=O and Ru(IV)-O.

US$19.90

PMID: 15578852

DOI: 10.1021/ic0494399


Other references

Tegtmeyer, C.J., 1977: Roentgenographic assessment of causes of cardiac pacemaker failure and complications. Implantation of a permanent pacemaker to stimulate the heart is a well established procedure of great benefit. However, a malfunctioning pacemaker is a hazard to well-bing and to life. Once a pacemaker has been installed the physician's atten...

Narasimhulu, S.B.; Kirti, P.B.; Prakash, S.; Chopra, V.L., 1992: Rapid and efficient plant regeneration from hypocotyl protoplasts of Brassica carinata. Protoplasts were isolated from hypocotyls of 7-d-old seedlings of three genotypes of Brassica carinata after enzymatic digestion in cellulase R-10 (0.5%) and pectolyase Y-23 (0.025%). The protoplasts were stabilized with 0.4 M mannitol used as osm...

Wang, Y-Shuai.; Cho, J-Gyeong.; Hwang, E-Son.; Yang, J-Eun.; Gao, W.; Fang, M-Zhe.; Zheng, S-Dao.; Yi, T-Hoo., 2017: Enhancement of Protective Effects of Radix Scutellariae on UVB-induced Photo Damage in Human HaCaT Keratinocytes. Radix Scutellariae (RS) has long been used in the treatment of inflammatory and allergic diseases. Its main flavonoids, baicalin (BG) and wogonoside (WG), can be hydrolyzed into their corresponding aglycones, baicalein (B) and wogonin (W). In this...

Rafie, S.; Lai, S.; Garcia, J.E.; Mody, S.K., 2015: Contraceptive use in female recipients of a solid-organ transplant. Women of reproductive age account for more than one-third of all solid-organ transplant recipients and are advised against becoming pregnant for 1 to 2 years after their surgeries. The risks posed to the woman, the transplanted organ, and the fetu...

Long, G-Bo.; Sun, C.; Li, J.; Cao, Y.; Zhou, B., 2015: Effects of various compounds on efficacy of artemisinin in a yeast model. Artemisinin is a key anti-malarial drug and few clinically meaningful resistant cases about its application have so far been reported. The World Health Organization (WHO) officially recommended the use of ACT (Artemisinin-based Combination Therapy...

Bregman, A.A., 1972: Asynchronous centromere division in the Chinese hamster. Cytogenetics 11(2): 102-112

Steinbrecher, Görgy.; Weyssow, B., 2004: Generalized randomly amplified linear system driven by gaussian noises: extreme heavy tail and algebraic correlation decay in plasma turbulence. The extreme heavy tail and the power-law decay of the turbulent flux correlation observed in hot magnetically confined plasmas are modeled by a system of coupled Langevin equations describing a continuous time linear randomly amplified stochastic...

Xu, H.; Gundry, S.R.; Hill, A.C.; Matsumiya, G.; Morimoto, T.; Fagoaga, O.; Tran, D.D.; Zuppan, C.W.; Nehlsen Cannarella, S.; Bailey, L.L., 1996: Delayed xenograft rejection in newborn discordant cardiac xenotransplantation. Circulation 94(8 SUPPL ): I111

Fernandez, L.A.; Gschwend, P.M., 2015: Predicting bioaccumulation of polycyclic aromatic hydrocarbons in soft-shelled clams (Mya arenaria) using field deployments of polyethylene passive samplers. Biota-sediment accumulation factors (BSAF), frequently used to predict tissue concentrations of organisms living within and above sediments contaminated with hydrophobic organic chemicals, often produce inaccurate estimates. Hence, freely dissolve...

De, H.N.; Bhaskaran, S., 1955: Histochemical localisation and measurement of enzyme activity in cells by photo-electric method. A new technique, the details of which have been communicated elsewhere, has been applied, by which the discharge of intake of dye fixed on a cell can be measured on a galvanometer with the help of a photocell attached to the microscope, fitted wit...