Two (E)-2-arylidene-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline compounds: supramolecular frameworks built with C-H...O and C-H...pi(arene) hydrogen bonds and pi-pi stacking interactions.
The pyrazine ring in two N-substituted quinoxaline derivatives, namely (E)-2-(2-methoxybenzylidene)-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline, C(30)H(28)N(2)S(2)O(5), (II), and (E)-methyl 2-[(1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxalin-2-ylidene)methyl]benzoate, C(31)H(28)N(2)S(2)O(6), (III), assumes a half-chair conformation and is shielded by the terminal tosyl groups. In the molecular packing of the compounds, intermolecular C-H...O hydrogen bonds between centrosymmetrically related molecules generate dimeric rings, viz. R(2)(2)(22) in (II) and R(2)(2)(26) in (III), which are further connected through C-H...pi(arene) hydrogen bonds and pi-pi stacking interactions into novel supramolecular frameworks.
Ghosh
Soumen
S
Department of Physics, Jadavpur University, Kolkata 700 032, India.
Mukhopadhyay
Rupa
R
Helliwell
Madeleine
M
Mukherjee
Alok K
AK
D001372:Aza Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D018360:Crystallography, X-Ray / Q000379:methods*; D006574:Heterocyclic Compounds, 2-Ring / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D006860:Hydrogen Bonding; D007536:Isomerism; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry; D011810:Quinoxalines / Q000737:chemistry*
D001372:Aza Compounds; D006574:Heterocyclic Compounds, 2-Ring; D011810:Quinoxalines; C523943:rac-(Z)-2-(2-Thienylmethylene)-1-azabicyclo(2.2.2)octan-3-ol; D002244:Carbon; D006859:Hydrogen; D010100:Oxygen