Ethyl 2-methoxy-6-[(triphenylphosphoranylidene)amino]nicotinate and ethyl 2-methylsulfanyl-6-[(triphenylphosphoranylidene)amino]nicotinate.
The molecules of ethyl 2-methoxy-6-[(triphenylphosphoranylidene)amino]nicotinate, C(27)H(25)N(2)O(3)P, (I), and ethyl 2-methylsulfanyl-6-[(triphenylphosphoranylidene)amino]nicotinate, C(27)H(25)N(2)O(2)PS, (II), have almost identical bond lengths and molecular conformations, and both show evidence for polarized electronic structures. However, the crystal structures, as illustrated by the weak hydrogen bonds linking the molecules, are significantly different. The significance of this study lies in the observation that two compounds which are almost identical in constitution, configuration and conformation nonetheless adopt different crystal structures.
Cobo
Justo
J
Departamento de Química Inorgánica y Orgánica, Universidad de Jaén, 23071 Jaén, Spain.
Glidewell
Christopher
C
Low
John N
JN
Orozco
Fabían
F
D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure; D009525:Niacin / Q000737:chemistry*
D009525:Niacin