h-Deformation of GL(1∣1)

An h-deformation of a (graded) Hopf algebra of functions on supergroup GL(11) is introduced via a contraction of GL _q (11). The deformation parameter h is odd (Grassmann). A related differential calculus on h-superplane is presented.     

Infrared studies of CO2(CO)8 adsorption on zeolites Y

Co₂(CO)₈ sublimed onto the surface of HY, CeY, CoY and two dealuminated forms of NaY zeolite is converted at room temperature to Co₄(CO)₁₂ and other surfacebound cobalt carbonyl species. The reaction proceeds in a different way on each of the above zeolites, depending also on their pretreatment.

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Co₂(CO)₈, HY, CeY, CoY NaY, Co₄(CO)₁₂ - . - .

     

Electronic spectra of α,β-unsaturated carbonyl compounds—III : β-alkylamino and β-dialkylamino acrylamides

Several β-alkylamino, β-dialkylamino and β-aziridino acrylamides have been synthesized and their configuration and conformation established by means of NMR and IR. Cis and trans isomers have been isolated in some cases, and their respective π → π* absorption maxima assigned. Configuration does not appreciably affect the frequency of this transition.     

Symmetrically bifurcate hydrogen bonding—III (sym-o,o′ diacyl)-diphenylamines

Symmetrically bifurcate three-centre hydrogen bonding,

, was found in several (sym-o,o′-diacyl)-diphenylamines, [o(RCOC₆H₄)]₂NH.     

Mesomorphous Properties of Azo- and Azoxyarylethanes as Potential Stationary Phases in Gas Chromatography

Two series of compounds have been synthesized: 1,2-bis(4′-butoxybenzeneazobenzene-4)ethanes and 1,2-bis(4′-butoxybenzeneazoxybenzene-4)ethanes. The effects of lateral substituents (CH₃, Cl, CN) on temperature are tested as well as the molar enthalpies and entropies of their phase transitions determined. The application of those compounds as liquid-crystalline stationary phases in gas chromatography is suggested.