Triazine complexes

On the other hand, the over-the-center coordination in a carousel copper(II)-triazine complex (Fig. 14) [92] appears to be the result of multiple hydrogen bonding and steric effects. 

Fig. 14 Fragment of crystal structure of carousel copper(II)-triazine complex showing over-the-center coordination of chloride anion to a triazine (coordinates from [92])...

On the basis of an IR study of some s-triazines and HA systems, several authors reported that ionic bonding took place between a protonated secondary amino group of the s-triazine and a carboxylate anion on the HA [17,146,147]. Successive studies, mainly conducted by IR spectroscopy, confirmed previous results and also provided evidence for the possible involvement of the acidic phenol-OH of HA in the proton exchange of the s-triazine molecule [17, 146-150]. Differential thermal analysis (DTA) curves measured by Senesi and Testini [146, 147] showed an increased thermal stability of the HA-s-triazine complexes, thus confirming that ionic binding took place between the interacting products. 

Reaction of 1,2,3-triazine with nucleophiles usually leads to ring opening via attack at C-4. However, silyl enol ethers react with chloroformate/l,2,3-triazine complexes to give 5-substituted 2,5-dihydro-1,2,3-triazines which can be rear-omatised using cerium(IV) ammonium nitrate. In this case, initial addition of the electrophile takes place at N-2, leading to the specific activation of C-5. °... 

Fig. 5 Side view and top view of the attack structure for the fluoride 1,3,5-triazine complex...

The authors state that a Cr- triazine complex due to electrostatic anion-7t interaction is present in the complex . Johnson, Hay et al. [45] have recently noticed that the role of the C - H groups of deficient arenes as potent hydrogen bonds should not be overlooked, in fact the structure of Meyer nicely illustrates this observation. The Cl(8) anion positioned above the center of the melamine is interacting with the C - H groups of the Cu(II)-coordinated pyridines. The hydrogen bonds formed may play a dominant role in determining the position of the anion within this cavity. 

Bezerra CWB, Zhang L, Lee K, Liu H, Zhang J, Shi Z, et al. Novel carbon-supported Fe—N electrocatalysts synthesized through heat treatment of iron tripyridyl triazine complexes for the PEM fuel cell oxygen reduction reaction. Electrochim Acta 2008 53 7703-10. 

Dias VL, Fernandes EN, da Silva LSM, Marques EP, Zhang J, Marques ALB (2005) Electrochemical reduction of oxygen and hydrogen peroxide catalyzed by a surface copper (II)-2,4,6-tris(2-piridil)-l,3,5-triazine complex adsorbed on a graphite electrode. J Power Sources 142(1-2) 10-17... 

Copper(II) triazine complexes promote cyclohexene oxidation via free radical pathways involving cyclohexenyl hydroperoxide [488] in a manner not dissimilar to... 

Inoue, H. Hosokawa, T. (Showa Denko KK). SUicate-triazine complex and flame retardant resin composite containing the same complex. Jpn. Patent JP10081510, Mar. 31, 1998. 

DMAP = N,N-dimethylaminopyiidine, DMF = N -dimethylformamide, DCM = dichloromethane, PTAT = phenyltrimethylammonium tribromide, EO = ethylene oxide, PO = propylene oxide, ECH = epichlrohydrin, SO = styreneoxide, AGH = allylicglycidil ether. BO = butylene oxide, HO = n-hexene oxide, DO = N-decene oxide, PPO = 2-phenylpropylene oxide, PS-DFILX = polymer supported diol functionalized ionic liquids, acac = acetyl acetonate, CIL= carboxylic-acid functionalized imidazolium-based ILs, note active site consideration for TOP calculation is not uniform. Co-valent triazine complexes... 

Sap et al. used an Fe (II) bis [2,4,6-tri(2-pyridyl)]-l,3,5-triazine complex embedded in the sensor for the determination of dodecyl sulfate (DS). Linear response was in the concentration range between 7 x 10 and 1.5 x 10 molL. No interference from inorganic ions was noticed while some other organic ions did. The potential jump magnitude increases with the alkyl chain length of the surfactant (formation of a more hydrophobic ion-pair). 

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