Sterically shielded pyramidal amino groups in two 4,4′-(arylmethylene)bis(6-allyl-3-chloro-2-methylaniline) derivatives
摘要:
4,4'-(Phenylmethylene) bis(6-allyl-3-chloro-2-methylaniline), C27H28Cl2N2, (I), and 4,4'-(2-thienylmethylene) bis(6-allyl-3-chloro- 2-methylaniline), C25H26Cl2N2S, (II), adopt similar molecular conformations, although the thienyl group in (II) exhibits orientational disorder over two sets of sites with occupancies of 0.614 (3) and 0.386 (3). The amino groups in both compounds are pyramidal. A single N-H center dot center dot center dot N hydrogen bond links the molecules of (I) into cyclic centrosymmetric dimers. Molecules of (II) are linked by an ordered C-H H center dot center dot center dot pi(arene) hydrogen bond to form cyclic centrosymmetric dimers, and these dimers are linked into statistically interrupted chains by a second C-H center dot center dot center dot pi(arene) hydrogen bond involving a donor in the minor component of the disordered thienyl unit.