1,1,4,4-Tetra­methyl­piperazinediium dibromide

Photofragment translational spectroscopy of 1,3-butadiene and 1,3-butadiene-1,1,4,4-d(4) at 193 nm.

The photodissociation dynamics of 1,3-butadiene at 193 nm have been investigated with photofragment translational spectroscopy coupled with product photoionization using tunable VUV synchrotron radiation. Five product channels are evident from this study: C(4)H(5) + H, C(3)H(3) + CH(3), C(2)H(3) + C(2)H(3), C(4)H(4) + H(2), and C(2)H(4) + C(2)H(2). The translational energy (P(E(T))) distributio...

Clathrates of TETROL: selective inclusion of methylcyclohexanones in their energetically unfavorable axial methyl conformations.

3- and 4-Methylcyclohexanone have been isolated exclusively as their energetically disfavoured axial conformers in the host-guest complexes formed upon recrystallization of the novel optically pure host compound, (+)-(2R,3R)-1,1,4,4-tetraphenylbutane-1,2,3,4-tetraol (TETROL), from these cycloalkanones.

Occupational Exposure Limits for 1,2-dibromoethane (ethylene dibromide)

1,2-Dibromoethane (ethylene dibromide).

Utility of Triphenylphosphine Dihalides in Organic Reactions : Esterification Using Triphenylphosphine Dibromide as the Dehydrating Agent

A new esterification method was investigated using triphenylphosphz'ne dibromide as a dehydrating agent. This investigation has established that the method is useful when the acid is aromati~ or arylallylic. That primary and secondary alcohols esteTZfy acid satisfactorily whereas tertiary alcohols fail to react was also established in this experiment.