Author/Authors :
ndez Tellez , Guadalupe Herna Laboratorio de Síntesis de Complejos - Facultad de Ciencias Químicas - Universidad Autónoma de Puebla, Mexico , Moreno, Gloria E. Laboratorio de Síntesis de Complejos - Facultad de Ciencias Químicas - Universidad Autónoma de Puebla, Mexico , Mendoza, Angel Centro de Química - Instituto de Ciencias - Benemérita Universidad Autónoma de Puebla, Mexico Ciudad Universitaria, Mexico , Sharma, Pankaj dInstituto de Química, Universidad Nacional Autónoma de México - Circuito Exterior s/n - Ciudad Universitaria, Mexico , Portillo, Oscar Centro de Química - Instituto de Ciencias - Benemérita Universidad Autónoma de Puebla, Mexico , Sharma, Pankaj Laboratorio de Síntesis de Complejos - Facultad de Ciencias Químicas - Universidad Autónoma de Puebla, Mexico , Gutiérreza, René Laboratorio de Síntesis de Complejos - Facultad de Ciencias Químicas - Universidad Autónoma de Puebla, Mexico
Abstract :
Using a general solvent-free procedure for the synthesis of chiral Schiff bases, the following compounds were synthesized and their crystal structures determined: (S)-(+)-2-{[(1-phenylethyl)imino]methyl}naphthalene, C19H17N, (1), (S)-(+)-2-({[(4-methylphenyl)ethyl]imino}methyl)naphthalene, C20H19N, (2), (R)-(−)-2-({[(4-methoxylphenyl)ethyl]imino}methyl)naphthalene, C20H19NO, (3), (R)-(−)-2-({[(4-fluorophenyl)ethyl]imino}methyl)naphthalene, C19H16FN, (4), (S)-(+)-2-({[(4-chlorophenyl)ethyl]imino}methyl)naphthalene, C19H16ClN, (5), (S)-(+)-2-({[(4-bromophenyl)ethyl]imino}methyl)naphthalene, C19H16BrN, (6), (S)-(+)-2-({[1-(naphthalen-1-yl)ethyl]imino}methyl)naphthalene, C23H19N, (7), (S)-(+)-2-{[(1-cyclohexylethyl)imino]methyl}naphthalene, C19H23N, (8), (S)-(−)-2-{[(1,2,3,4-tetrahydronaphthalen-1-yl)imino]methyl}naphthalene, C21H19N, (9), and (+)-2-({[(1S,2S,3S,5R)-2,6,6-trimethylbicyclo[3.1.1]hept-3-yl]imino}methyl}naphthalene, C21H25N, (10). The moiety provided by the amine generates conformational flexibility for these imines. In the crystals, no strong intermolecular contacts are observed, in spite of the presence of aromatic groups
Keywords :
crystal structure , chiral compounds , Schiff base , naphthyl , imine
