Cavendish synthesized water for the first time by exploding a mixture of hydrogen and oxygen with an electric spark, and in 1783 the French scientist A. Lavpisier repeated these experiments and for the first time drew the correct conclusion that water is a compound of hydrogen and oxygen. In ...
A composition comprising: (a) a compound of structural formula (1), wherein each of R* and R** is independently a linear, branched or cyclic alkylene group containing 2 to 12 carbon atoms, wherein no two nitrogen atoms are separated by f... KEYS Robert O.,FRIEDLI Floyd E.,DALRYMPLE...
is reduced with H2 over Raney-Ni in ethanol giving ethyl 3-(4-benzyloxyindol-3-yl)-2-amino-5-oxahexanoate (VIII). Finally, this compound is cyclized with paraformaldehyde (IX) in refluxing benzene. 2) Compound (VIII) can also be cyclized with glyoxylic acid (X) yielding a mixture of ...
A series of mononuclear oxomolybdenum-(IV), -(V) and -(VI) complexes has been prepared from the precursor complex [MoVL(O)l2]PF62 where L = 1,4,7-triazacyclononane. Compound 2 is reduced by NEt3 in MeCN yielding [MoIVl(o)l2]3. The iodide... Gabriele Haselhorst,Karl Wieghardt,Be...
Above 800 °C, CO is the predominant product: CO2 + C → 2 CO (ΔH = 170 kJ/mol) Another source is "water gas", a mixture of hydrogen and carbon monoxide produced via the endothermic reaction of steam and carbon: H2O + C → H2 + CO (ΔH = +131 kJ/mol) Other similar "...
monoclinic,spacegroupP21/nwitha=1.75168(6)nm,b=1.16014(4)nm,c=2.58530(8)nm,/~=104.331(4)o,V: 5.09030)nm,Z=4,Cs4H2s. 5oCl2F2Mn2.N808. 25,Mr=1140.13,D=1.488g·cm,F(000)=2306,/.t(Mo胁1=O.673mm～. R=O.0605andwR=O.1616.Thecompound1exhibitstwo.dimensionalwavvlayerstructureswhi...
The crystal structure of the title compound, CoK2(H2P2O7)2·2H2O, is, to our knowledge, the first example of a mixed-metal dihydrogendiphosphate, containing an alkali earth metal and a divalent transition metal. The metal ions and th... AA Tahiri,R Ouarsal,M Lachkar,... - 《Ac...
Solubility studiesArsenicVanadiumThe new arsenato polyxoxvanadate (NH4)4[V12As8O40(H2O)]·4H2O (1) was obtained under solvothermal conditions using either a mixture of ethyl ether/H2O or ethanol/H2O acting as reducing agents. Compound 1 crystallizes in the orthorhombic space group Pnnm with a...
Synthesis, Crystal Structure and Photoluminescent Property of a 3D Hydrogen-bonded Supramolecular Compound with Large Channels Q.; Chen, L.; Wu, M. Y.; Hong, M. C. Synthesis, crystal structure and photoluminescent property of a 3D hydrogen-bonded supramolecular compound ... CY Yue,FL Jiang,DQ...
ethylenediaminetetraacetic acid and water were added to the enamel reaction tank, and sodium hydroxide solution was added with stirring. The reaction mixture was heated to complete reaction, and hydrochloric acid was added to pH 4.5. It is concentrated by heating to 90 ° C., filtered, the filt...