1-Arylquinolizidines

The reaction of arylmagnesium bromides with 1-ketoquinolizidine provided predominantly 1(e)-aryl-1(a)-hydroxyquinolizidines. Dehydration of the latter and subsequent hydrogenation yielded 1-arylquinolizidines.     

On the impossibility of Directed Moore Graphs

This note introduces the notion (d, k) Directed Moore Graphs (DMG in short), and investigates the question of their existence. A (d, k) DMG is a regular directed graph of degree d and diameter k containing the maximum number of nodes according to a certain definition. It is shown that unless d = 1 or k = 1 there are no (d, k) DMG's.     

SO(N) higgs problem with adjoint+vector representations and non-linear potentials

Using the recently devised geometrical method, we analyze the quartic Higgs potential for SO(N) adjoint+vector representations. The minimum energy solutions are found to correspond to maxi-maximal little groups, but not all such groups are used. However, in the complete orbit space (including invariants not employed in the Higgs potential) we find that their strata have somewhat equal geometrical status of being low dimensional singular subspaces, i.e., cusps, edge curves, two-dimensional surfaces, etc. We also consider simple scalar potentials which are nonlinear with respect to orbit parameters and show that the directional extremum often, though not always, remains monotonic in orbit parameters within the orbit space and consequently the absolute extremum is likely to occur on the most protrudent portions of the orbit space boundary. Thus we clarify the range of validity of the Michel-Radicati conjecture and the Gell-Mann-Slansky conjecture.     

Temperature dependence of kinetics of triplet formation in phenazine: analysis by analogue computer

The temperature dependence of kinetic parameters of triplet phenazine have been determined by analysis of transient response to photoexcitation. The analogue computer used in the analysis is described.     

Transient nutations of photoelectrons from alkali metal anions

Transient nutations of the magnetization of photoelectrons ejected from rubidium and cesium anions are described. The nature of the nutations requires that the time between photoexcitation and appearance of the photoelectron is less than ≈10^?7 s.     

6-Aryl-1-azabicyclo [5.4.0] undecanes

Some 6-aryl-6-hydroxy-l-azabicyclo[5.4.0]undecanes and their esters were synthesized as potential cardiovascular agents and analgetics of the proheptazine type, respectively. Also, 6-aryl-1-azabicyclo[5.4.0]undecanes were prepared as rigid structures related to the phenethylamine CNS stimulants.     

Structures of anti,Z-4,4-dimethyl-3-thiosemicarbazide, syn,E,Z-2,4-dimethyl-3-thiosemicarbazide and syn,E-1-cyclopentano-3-thiosemicarbazone

The structures of three alkyl derivatives of thiosemicarbazide are described: anti,Z-4,4-dimethyl-3-thiosemicarbazide (1), syn,E,Z-2,4-dimethyl-3-thiosemicarbazide (2), and syn,E-1-cyclopentano-3-thiosemicarbazone (3). Crystal data: for 1: triclinic, P-1 (#2), a = 5.802(1)Å, b = 6.935(1)Å, c = 8.104(2)Å, = 78.35(1)°, = 82.13(1)°, = 70.71(1)°, and Z = 2; for 2: orthorhombic, Pbca (#61), a = 9.417(3)Å, b = 8.624(2)Å, c = 15.169(3)Å, and Z = 8; for 3: triclinic, P-1 (#2), a = 6.068(3)Å, b = 8.145(4)Å, c = 8.666(5)Å, = 83.75(4)°, = 86.16(5)°, = 74.07(4)°, and Z = 2. In general, molecules are linked by N–H···S hydrogen bonds with sulfurs accepting two or three hydrogen bonds. Structures 2 and 3, which adopt the syn conformation, form N–H···N intramolecular hydrogen bonds. The solid-state structures are consistent with their infrared and proton nuclear magnetic resonance spectra.