title: Crystal packing in the structures of diethanolamine derivatives.
abstract: Four distinct hydrogen-bonding topologies were observed in the structures of six diethanolamine ligands. These compounds are (1R*,2R*)-2-[(2-hydroxyethyl)(methyl)amino]-1,2-diphenylethanol, C(17)H(21)NO(2), (I), 1-[(2S)-2-(hydroxydiphenylmethyl)pyrrolidin-1-yl]-2-methylpropan-2-ol, C(21)H(27)NO(2), (II), 2-[(2-hydroxyethyl)(methyl)amino]-1,1-diphenylethanol, C(17)H(21)NO(2), (III), 1-{(2-hydroxy-2-methylpropyl)[(1S)-1-phenylethyl]amino}-2-methylpropan-2-ol, C(16)H(27)NO(2), (IV), 1-{[(2R)-2-hydroxy-2-phenylethyl][(1S)-1-phenylethyl]amino}-2-methylpropan-2-ol, C(20)H(27)NO(2), (V), and (1R*,2S*)-2-[(2-hydroxyethyl)(methyl)amino]-1,2-diphenylethanol, C(17)H(21)NO(2), (VI). In each compound, all ;active' hydroxy H atoms are engaged in hydrogen bonding, but the N atoms are not involved in intermolecular hydrogen bonding. In the structures of (I), (II) and (IV)-(VI), molecules are linked into chains by intermolecular O-H...O interactions. These chains are organized in such a way as to hide the hydrophilic groups inside, and so the outer surfaces of the chains are hydrophobic. The structure of (VI) contains two distinct non-equivalent systems of intermolecular O-H...O hydrogen bonds formed by disordered hydroxy H atoms.
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninskii Prospect, Moscow 119991, Russian Federation. churakov@igic.ras.ru
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Churakov
authors.forename: Elmira Kh
authors.initials: EKh
authors.lastname: Lermontova
authors.forename: Kirill V
authors.initials: KV
authors.lastname: Zaitsev
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Huang
authors.forename: Sergey S
authors.initials: SS
authors.lastname: Karlov
authors.forename: Galina S
authors.initials: GS
authors.lastname: Zaitseva
authors.forename: Judith A K
authors.initials: JA
authors.lastname: Howard