Journal of the Chemical SocietyThe Society., 1955 |
From inside the book
Results 1-3 of 75
Page 3755
... steric hindrance to uniplanarity raises the energy of the excited state more than that of the ground state , i.e. , the transition energy increases and Amax . is displaced to shorter wavelength . Thus , steric effects of this type ...
... steric hindrance to uniplanarity raises the energy of the excited state more than that of the ground state , i.e. , the transition energy increases and Amax . is displaced to shorter wavelength . Thus , steric effects of this type ...
Page 3758
... steric hindrance to uniplanarity of the Ph - C = O chromophore when the formyl group is replaced by an acetyl group . This increase can be clearly seen by comparing the projections of the two less - hindered conformations ( Ia ) and ...
... steric hindrance to uniplanarity of the Ph - C = O chromophore when the formyl group is replaced by an acetyl group . This increase can be clearly seen by comparing the projections of the two less - hindered conformations ( Ia ) and ...
Page 3778
... steric in origin . ( The effect of m - methoxyl groups on e , which is somewhat exceptional , is discussed below ... steric origin of the spectral displacements in mono - o - substituted diphenyl is accepted , this system provides an ...
... steric in origin . ( The effect of m - methoxyl groups on e , which is somewhat exceptional , is discussed below ... steric origin of the spectral displacements in mono - o - substituted diphenyl is accepted , this system provides an ...
Contents
Alkenylation with Lithium Alkenyls Part IX Synthesis of Dimethylbutadiene PAGE | 3324 |
Alkenylation with Lithium Alkenyls Part XII Dihydronaphthyl and Indenyl | 3337 |
11dimethylcarbazoles | 3362 |
24 other sections not shown
Other editions - View all
Common terms and phrases
4-dinitrophenylhydrazone absorption acetic acid acetic anhydride acetone acetyl added alcohol aldehyde alumina Amer ammonia aqueous ethanol atoms band benzene boiling Braude bromide Calc carbonate Chem chloride chloroform chromatography colour compound concentrated cooled crystallised from ethanol crystals cyclohexanone decomp derivatives dilute dissolved distilled dried electrode eluted ester ethanol ether evaporated filtered filtrate formed Found fraction gave give m. p. heated hydrochloric acid hydrogen hydrolysis imidine infrared iodide isolated ketone light petroleum b. p. lithium lithium aluminium hydride m. p. and mixed methyl mixed m. p. mixture molecules nickel nitrobenzene nitrogen obtained oxide peroxide phenolic potassium hydroxide prepared prisms pyridine Raney nickel reaction recrystallized reduction refluxed Reprint Order requires residue room temperature salt semicarbazone silicon tetrachloride sodium hydroxide solid solution solvent spectra steric stirred substituents sulphate sulphuric acid Table values washed yellow yield