In 2:1 LiClO4 trimethylamine-N-oxide and 4-methoxypyridine-N-oxide mixtures 2:1 Li+-N-oxide complexes are formed. If more N-oxide is present, 1: 2 complexes form. In the intermolecular O…Li+…O bonds the Li+ ions fluctuate in a broad flat single-minimum potential. These bonds show so-called Li+...
Crystal structure of [ReO2(4-MeOpy)4][PF6] (4-MeOpy = 4-methoxypyridine) complex has been examined by the single crystal X-ray analytical method. This complex shows a trans-dioxo geometry (average Re–O bond length = 1.766(2) Å) and its equatorial plane is occupied by four 4-MeOpy molecules (ave...
Three cobalt(II) isothiocyanato complexes with 4-methoxypyridine (4-MOP) as a co-ligand have been synthesized: catena-[Co(4-MOP)2(μ1,3-NCS)2] (1), trans-[Co(4-MOP)4(NCS)2] (2), and [Co(4-MOP)2(NCS)2] (3) and structurally characterized by IR, UV–Vis spectroscopy and single crystal X-ray diffrac...
4-Methoxypyridine N-oxide reacts with various silver(I) salts to consistently generate 1-D coordination polymers within which the ligand bridges one, two or three silver atoms. In all three structures described the counteranions are non-coordinating and there are subtle differences in the ways i...
A study has been made of the Ulman polycondensation of potassium p-bromophenolate in a diphenyl oxide medium. In view of the heterogeneity of the system the reaction takes place in two stages, the first being a process of transformation of solid bromophenolate with formation of low molecular α-...
Molecular structure and properties of 2-fluoro-4-bromobenzaldehyde (FBB, C7H4BrFO) was experimentally investigated by X-ray diffraction technique and vibrational spectroscopy. Experimental results on the molecular structure of FBB were supported with computational studies using the density funct...
Nonlinear optical (NLO) organic compound, 4-bromobenzaldehyde-4′-N′-methylstilbazolium tosylate was synthesized by reflux method. The formation of molecular complex was confirmed from 1H NMR, FT-IR and FT-Raman spectral analyses. The single crystals were grown by slow evaporation solution grow...
2-Phenyl-1H-benzimidazoles 7a–e were synthesized and tested for gene activation on ERα-positive MCF-7 breast cancer cells, stably transfected with the reporter plasmid EREwtcluc (MCF-7-2a cells). None of the compounds showed agonistic properties, but they antagonized dependent on hydroxyl grou...
A novel method is described for the preparation of porous cyanate ester networks by using the self-assembly and organo-gelation of the monomers and subsequent curing of the xerogels. Dicyanate esters (CE) were synthesized by the reaction of dihydroxy aromatic compounds (OH) with cyanogen bromide...
Blends of benzoxazine and cyanate ester have been actively studied by multiple research groups. Depending on the structure of benzoxazine, miscible or immiscible blends have been reported. Different reaction mechanisms in the blend have been reported. This chapter discusses the miscibility or im...
The microwave spectrum of phenyl cyanate was observed in the frequency ranges 15-18 and 30-40 GHz. Rotational constants were obtained for the ground and first eight excited states of the torsional vibration of the cyanate group with respect to the phenyl ring. The values of the inertia defect in...
A series of cyanate ester resin (CY)/polyhedral oligomeric silsesquioxane (POSS) nanocomposites were prepared successfully. Morphology and thermal stability of the CY and its nanocomposites with POSS were studied by means of scanning electron microscopy (SEM) and Thermogravimetric Analysis (TGA)...
Benzoxazinyl modified polyhedral oligomeric silsesquioxane (BZPOSS) is successfully synthesized and used to prepare nanocomposites with bisphenol A cyanate ester (BADCy). The DSC results showed that the curing peak temperature of BZPOSS/BADCy blend decrease significantly from 317.1 °C to 160.3 ...
This chapter summarizes the fundamentals and applications of cyanate ester resins. The monomers used for this are also discussed. The cyanate esters are used for rheological properties and are synthesized by the reaction of phenols with cyanogen halides. Special additives are used that increase ...
The vibrations in the OCN stretching region of phenyl cyanate are examined by two-dimensional infrared spectroscopy. In water and THF, these spectra display three diagonal peaks having cross peaks characteristic of anharmonically coupled transitions. The pattern of the spectra is reproduced by c...
The surface chemistry of phenyl cyanate and phenol on Al(111) was investigated by temperature-programmed desorption and X-ray photoelectron spectroscopy between 100 and 800 K. Chemisorption of the initial monolayer occurred via cleavage of the OCN bond for phenyl cyanate and the OH bond for ...
Terpolymerizations of CO2, propylene oxide (PO), and 4-vinyl cyclohexene oxide (VCHO) were successfully catalyzed by a single cobalt(III) complex of a salen-type ligand bearing one quaternary ammonium salt on the five-position of each aromatic ring. The influences of various reaction conditions ...
The synthesis and characterization of novel peripherally tetra-substituted iron(II) 4 and cobalt(II) 5 phthalocyanines are described for the first time in this study. All the new compounds are characterized by a combination of IR, 1H and 13C NMR, mass and UV–vis spectroscopy techniques. Complex...
In this work, the new phthalonitrile derivatives 4, 5 bearing 1,3-bis(naphthalen-1-yloxy)propan-2-ol and 1,3-bis(naphthalen-2-yloxy)propan-2-ol, cobalt phthalocyanine complexes have been synthesized. The new cobalt phthalocyanines have been prepared by cyclotetramerization of phthalonitrile deri...
A phytochemical investigation of Monanthotaxis congoensis afforded eight polyoxygenated cyclohexenes as well as the known crotepoxide. Structures were determined using NMR, MS, and optical rotation analyses. One compound displayed moderate antiproliferative activity against NCI-H460 and M14 canc...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View