And allenes

Klippenstein S J, East ALL and Allen W D A 1994 First principles theoretical determination of the rate constant for the dissociation of singlet ketene J. Chem. Phys. 101 9198-201... 

Hays E F and Allen L C 1970 Mole. A system for quantum chemistry I. General description Int. J. Quantum Chem. S 3 715-25 Hehre W J, Lathan W A, Ditchfieid R, Newton M D and Popie J A 1971 Program No 236 (Bloomington, IN Quantum Chemistry Program Exchange)... 

Ph3SnCl and propargylmagnesium bromide give a 90 10 mixture of the acetylenic and allenic tin derivatives, while in the case of Me3SnCl this ratio is 30 70 . 

Trimethylsilylation with trimethylchlorosilane affords the corresponding allene derivative, hydroxyalkylation with aldehydes and ketones gives mixtures of comparable amounts of acetylenic and allenic carbinols. 

T.F. Rutledge, "Acetylenes and Allenes", Reinhold Book Corporation, New York, Amsterdam, London, (1969). 

Kneaders Kneading Kneading mixers Knecht compound Knecht method Knife mills Knight and Allen Knives Knize Ten Knockdown Knockdown resistance... 

Knight and Allen. This is a copper reduction method for reducing sugars in white sugar up to 0.02%. It utilizes EDTA to determine excess unreacted copper. Tests undertaken in 1994 to extend the range of this method were unsuccesshil. In spite of poor performance in ring tests, it remains an official ICUMSA method. 

Minimum Wetting Rate The minimum liquid rate required for complete wetting of a vertical surface is about 0.03 to 0.3 kg/m s for water at room temperature. The minimum rate depends on the geom-etiy and nature of the vertical surface, liquid surface tension, and mass transfer between surrounding gas and the liquid. See Ponter, et al. Int. J. Heat Mass Tran.fer 10, 349-359 [1967] Trans. Inst. Chem. Eng. [London], 45, 345—352 [1967]), Stainthorp and Allen Trans. Inst. Chem. Eng. [London], 43, 85-91 [1967]) and Watanabe, et al. ]. Chem. Eng. [Japan], 8[1], 75 [1975]). 

M 404.2, d 0.884. A 30% (v/v) soln in benzene was washed twice with an equal volume of 1.5M HBr. [Petrow and Allen, Anal Chem 33 1303 1961.] Purified by dissolving 50g in CHCI3 (lOOmL) and shaking with 20% NaOH soln (200mL) for lOmin, and then with 20% NaCl (200mL) for lOmin. Washed with small amount of H2O and filtered through a dry filter paper [Adam and Pribil Talanta 18 733 1971]. 

Dissolved in benzene and ppted as its bisulfate by shaking with 4M H2SO4. Filtered, washed with benzene, separating by centrifugation, then the free base was liberated by treating with aqueous NaOH [McDowell and Allen J Phys Chem 65 1358 1961]. 

Swift, K. G. and Allen, A. 1994 Product Variability Risks and Robust Design. Proc. Instn Mech. Engrs, Part B, 208, 9-19. 

Four-membered heterocycles are easily formed via [2-I-2] cycloaddition reac tions [65] These cycloaddmon reactions normally represent multistep processes with dipolar or biradical intermediates The fact that heterocumulenes, like isocyanates, react with electron-deficient C=X systems is well-known [116] Via this route, (1 lactones are formed on addition of ketene derivatives to hexafluoroacetone [117, 118] The presence of a trifluoromethyl group adjacent to the C=N bond in quinoxalines, 1,4-benzoxazin-2-ones, l,2,4-triazm-5-ones, and l,2,4-tnazin-3,5-diones accelerates [2-I-2] photocycloaddition processes with ketenes and allenes [106] to yield the corresponding azetidine derivatives Starting from olefins, fluonnaied oxetanes are formed thermally and photochemically [119, 120] The reaction of 5//-l,2-azaphospholes with fluonnated ketones leads to [2-i-2j cycloadducts [121] (equation 27)... 

Et4N F , CH3CN, 48 h, reflux. TMSF and allene are formed in the cleavage reaction. These conditions are not compatible with phenyl phosphates, which are cleaved preferentially with fluoride.Cleavage of a bis TMSP phosphate results in the cleavage of only one of the TMSP groups. 

Roll, L.T.C. and Allen, J. S. (1997). The Steam Engine of Thomas Newcomen. Ashbourne, UK Landmark... 

The facile thermal decomposition of the dimethyl and diethyl derivatives of (II) to nitrogen and carbene intermediates is emphasized by the readily discernible correlations between the reactant and product orbitals. On the other hand, the greater delocalization of the molecular orbitals of (I) may be a factor in its preference to rearrange, without decomposition, to methyl acetylene and allene. 

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