F 2-Butyne

Ammonium hexacyanoferrate(II), 2577 f Arsine, 0100 Azido-2-butyne, 1473 3-Azidopropyne, 1114 c /.v-A/obcn/cnc, 3484 Azoxybenzene, 3485 Barium azide, 0214 Benzenediazonium nitrate, 2275 Benzotriazole, 2269 Borane, 0135 Bromine azide, 0256 f 3-Bromopropyne, 1090 f 1,2-Butadiene, 1479 f 1,3-Butadiene, 1480 f Buten-3-yne, 1423 f 1-Butyne, 1481 f 2-Butyne, 1482 Cadmium azide, 3957 Cadmium cyanide, 0588 Cadmium fulminate, 0589 Cadmium nitride, 3960... 

Methyl-3-buten- 1-ynyltriethyllead, 3407 f iV-Methylbutylamine, 2027 f 3-Methyl-1-butyne, 1888 Methyl 2-butynoate, 1875 f 2-Methyl-3-butyn-2-ol, 1904 f Methyl butyrate, 1968... 

Ammonium perchlorate, Impurities, 3998 Azidoacetic acid, 0770 f Aziridine, Acids, 0859 Benzoyl azide, 2694 Benzyl chloroformate, 2926 1,2-Bis(difluoroamino)-/V-nitroethylamine, 0799 Bromine trioxide, 0259 2-Butanone oxime, 1649 2-Butyne-l,4-diol, 1523 Butyraldehyde oxime, 1650 Carbon, Unsaturated oils, 0297 Chlorine, Carbon disulfide, 4041 f l-Chloro-2,3-epoxypropane, Contaminants, 1158 Cyanogen chloride, 0322 Diethyl phosphorochloridate, 1675 f 1,1-Difluoroethylene, 0696... 

Explain what is wrong with each of the following names (a) 3-methyl-2-propanol (b) 3,3-dimethyl-2-pentene (c) 1,4-dichlorocyclyobutane (d) 2-propanal (e) 2-methyl- 1-butyne (f) pentanoicacid. 

Write a condensed formula for (a) butane, (b) 2-butene, (c) 1-butyne, (d) 1-butanol, (e) butanal, (f) butanone, (g) butanoic acid, (h) butanamide. 

All possible isomers of 1,2-butadiene were observed in the gas phase deuteration of this molecule. Such isomerization is an unusual feature of diene and alkyne hydrogenation because the desorption rate of di-unsaturated hydrocarbons is usually very slow. A thermodynamic factor can hardly have been promoting this desorption because, from evidence discussed in Section II, F, 1, 1,2-butadiene appears to be most weakly adsorbed of the C4He isomers. One mechanism of reactant isomerization involves simply the loss of a hydrogen atom from adsorbed C4H, for which three relevant structures can be written. The 2-butyne, which was the major isomer produced, was largely unexchanged, how-... 

The heats of formation of phenylalkynes were obtained from combustion by Rossini s group . For ethylbenzene they used i/f = 29.94 0.79 kJ mol and obtained the enthalpy of formation for phenylacetylene equal to 306.76 1.71 kJ mol Using the combustion results ofRossini sgroup " , for -propylbenzene 7.91 0.79 J mol Rogers obtained the enthalpy of formation for 1-phenyl-1-propyne 268.33 2.18 kJ mol The same method used for 1-phenyl-1-butyne, assuming that for -butylbenzene equals... 

A soln. of 3,3-dimethyl-1-butyne in ether at —78° under Nj treated slowly with n-butyllithium, the formed Li-acetylide added slowly via cannula to triisopropoxy-borane in the same solvent with stirring, kept at —78° for 2 h, treated with anhydrous HCl, and allowed to warm to room temp. 3,3-dimethyl-1-butynyldiisopropoxy-borane. Y 90%. Attempted transesterification of the products resulted in B-C bond cleavage. F.e.s. H.C. Brown et al., Tetrahedron Letters 29, 2631 (1988). 

CH3CH2C=CH 2 CH3CH cH2[Pg.319]

Monodeprotonation of terminal alkynes is conveniently accomplished with n-BuLi the use of excess r-BuLi in hexane may lead to polylithiation. For example, treatment of 1-butyne with 3 equiv of f-BuLi in hexane affords a mixture of allene and alkyne upon quench with an electrophile (eq 2). ... 

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