2223-95-2Relevant academic research and scientific papers
Synthesis and Physico-Chemical Studies of Some Polynuclear Mixed Carboxylate Complexes of Nickel(II)
Baranwal, B. P.,Parashar, G. K.,Mehrotra, R. C.
, p. 1203 - 1212 (1980)
A number of polynuclear mixed carboxylates of nickel(II) with the general composition x (where R'=C13H27, C15H31, C17H35 and C21H43 and n=1 or 2) have been synthesized by the transacylation reactions of anhydrous nickel acetate with higher carboxylic acids in refluxing toluene.On recrystallization from benzene-alcohol mixtures, mono-alcoholate complexes, Ni(OOCCH3)2-n(OOCR')n*ROH (where R=CH3 and C2H5) have been isolated.All these derivatives have been characterized by the molecular weight determinations, infra-red and electronic reflectance spectra and magnetic susceptibility measurements. - Keywords: IR Spectra; Magnetic susceptibility measurements; Carboxylates, Ni(II); Nickel(II)-carboxylates; UV-spectra
Wet-chemical catalyst deposition for scalable synthesis of vertical aligned carbon nanotubes on metal substrates
Doerfler,Meier,Thieme,Nemeth,Althues,Kaskel
, p. 288 - 293 (2011/10/06)
A scalable process for carbon nanotube (CNT) growth on metallic substrates has been developed including dip-coating steps for the wet-chemical catalyst and co-catalyst layer deposition and a subsequent chemical vapor deposition step. Organic metal salt/2-propanol solutions were applied as precursors for alumina co-catalyst thin films and the actual Fe (Co, Mo) catalyst layer. Vertical aligned carbon nanotube forests were obtained on catalyst-coated nickel foil in a thermal CVD process at atmospheric pressure and 730 °C using ethene as carbon source. The influence of the catalyst composition on growth rate, density and structure of resulting CNT films was investigated.
Catalytic oxidative cleavage of terminal olefins by chromium(III) stearate
Jarupinthusophon, Suekanya,Thong-In, Uthumporn,Chavasiri, Warinthorn
, p. 289 - 294 (2008/10/09)
A new synthetic methodology for the preparation of carbonyl compounds from the oxidative cleavage of terminal olefins has been developed. With the use of TBHP in combination with chromium(III) stearate, selective oxidation of double bonds conjugated with aromatic ring or carbonyl group could be achieved at ambient temperature in moderate to excellent yield. The oxidative cleavage of electron rich α-methylstyrene derivatives proceeded in good to excellent yield whereas lower yields were observed in α-methylstyrene derivatives containing an electron withdrawing group. This developed oxidation reaction was believed to undergo via free radical process and high valent chromium oxo species.
Synthesis of biodiesel via homogeneous Lewis acid catalyst
Di Serio,Tesser,Dimiccoli,Cammarota,Nastasi,Santacesaria
, p. 111 - 115 (2008/10/09)
Nowadays, most biodiesel (fatty acids methyl esters, FAME) is produced by the transesterification of triglycerides (TG) of refined/edible type oils using methanol and an homogeneous alkaline catalyst. However, production costs are still rather high compared with the ones of petroleum-based diesel fuel. To lower costs and make biodiesel competitive less-expensive feedstocks such as waste fats or non-edible type oils could be used. The use of homogeneous alkaline catalysts in the transesterification of such types of fats and oils poses great difficulties due to the presence of large amounts of free fatty acids (FFA). This paper studies the use of carboxylic salts as a possible alternative, because these catalysts are active also in the presence of high FFA concentrations. The most active catalyst (Cd, Mn, Pb, Zn carboxylic salts) have been individuated and a correlation of the activities with the cation acidity has been found.
Phenylalkanoic acid esters and their use as antioxidants
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, (2008/06/13)
Compounds of formula (I): STR1 wherein: R1 represents an alkyl group having from 1 to 6 carbon atoms; R2 represents an alkyl group having from 8 to 24 carbon atoms; EO represents an ethyleneoxy group; PO represents a propyleneoxy group; k is 0 or an integer from 1 to 10; and m is an integer from 1 to 4; provided that the total of (k+m) is greater than 1 and not greater than 10; are useful as antioxidant stabilizers for polymeric materials.
Recent Advances in the Chemistry of Simple and Bimetallic Alkoxides of Later Transition Elements (with particular reference to the 3d' series)
Mehrotra, R. C.
, p. 715 - 722 (2007/10/02)
After giving a survey of the spurt in the literature during the last 4-5 years on the chemistry of later transition metals in general, a brief account has been presented of the recent work carried out in the author's laboratories on the simple and bimetallic alkoxides of later '3d' metals.The synthesis of a number of simple alkoxides of Cr(III and IV), Mn(II), Fe(II and III), Co(II), Ni(II) and Cu(II) has been described.Except for alkoxides of iron(III), Fe(OR)3 in general and Cr(OBut)4, almost all these alkoxides are non volatile and insoluble in organic solvents.These polymeric alkoxides of alter '3d' metals further differ from the alkoxides of earlier transition and main group metals in comparatively much lesser lability of their alkoxy groups.The sharp differences (again observed for the first time in metal alkoxide chemistry) in the alcoholysis reactivity of these alkoxides with changes in ramification of the alkyl group have been correlated with changes in their stereochemistry.Further, a large number of monomeric volatile bimetallic isopropoxides of the above metals with the general formula Mi)4>n, have been synthesised.Physico-chemical (spectroscopic and magnetic) properties of these derivatives indicate simple coordinated structures with tetraisopropoxyaluminate moieties functioning as bidentate and in some cases as tridentate ligands.
