(R,R)-N,N′-Bis(ferrocenylmethyl)cyclohexane-1,2-diamine

Ii Nn Ss Tt Rr Uu Cc Tt Ii Oo Nn Ss Ff Oo Rr Uu Ss E

Gauge - invariant formulation of NN → NN γ

H. Haberzettl1,* and K. Nakayama2,3,† 1Institute for Nuclear Studies and Department of Physics, The George Washington University, Washington, DC 20052, USA 2Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA 3Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich, Germany (Received 8 November 2010; revised manuscript r...

3-Methyl­benzene-1,2-diamine

The title compound, C7H10N2, was synthesized from 2-methyl-6-nitro-aniline by a reduction reaction. In the crystal, molecules are linked via N-H⋯N hydrogen bonds, forming two-dimensional networks lying parallel to (100). These networks are stabilized by C-H⋯π and N-H⋯π inter-actions.

RR-92-30-axiom.dvi

Various feature descriptions are being employed in logic program ming languages and constrained based grammar formalisms The com mon notational primitive of these descriptions are functional attributes called features The descriptions considered in this paper are the possi bly quanti ed rst order formulae obtained from a signature of binary and unary predicates called features and sorts respect...

Pyridine-2,3-diamine

The mol-ecule of the title pyridine derivative, C(5)H(7)N(3), shows approximately non-crystallographic C(s) symmetry. Intra-cyclic angles cover the range 117.50 (14)-123.03 (15)°. In the crystal, N-H⋯N hydrogen bonds connect mol-ecules into a three-dimensional network. The closest inter-centroid distance between two π-systems occurs with the c-axis repeat at 3.9064 (12) Å.