Ontology highlight
ABSTRACT:
SUBMITTER: Tabatabaee M
PROVIDER: S-EPMC3151875 | biostudies-other | 2011 Jul
REPOSITORIES: biostudies-other
Acta crystallographica. Section E, Structure reports online 20110604 Pt 7
The title compound, C(22)H(28)N(2)O(4), contains two independent centrosymmetric mol-ecules (A and B). In the previous structure determination [Xia et al. (2007 ▶). Acta Cryst. E63, o259] both A and B were modelled as neutral mol-ecules with the H atoms of the the O-H groups included in calculated positions. In this redetermination, the transferrable H atoms were located in difference maps and freely refined, indicating that one mol-ecule (A) crystallizes in the neutral (nonzwitterionic) form an ...[more]