title: Structure of tBuCO-Val psi [NH-CO]NHtBu.
abstract: N-Isobutylidenedipivalamide, C14H28N2O2, Mr = 256.39, orthorhombic, P2(1)2(1)2(1), a = 16.656 (2), b = 9.751 (2), c = 10.583 (2) A, V = 1718.8 A3, Z = 4, D chi = 0.99 g cm-3, lambda(Cu K alpha) = 1.5418 A, mu = 4.56 cm-1, mu Rmax much less than 1, F(000) = 568, T = 293 K, R = 0.081 for 887 observed reflections. The geometrical parameters of this retro-peptide molecule are quite similar to the standard values for peptides. Conformational angles are phi = -101 (1), phi' = 99 (1) degrees.
authors.affiliation: Laboratoire de minéralogie et cristallographie, UA CNRS 809, Université de Nancy I, France.
authors.forename: L
authors.initials: L
authors.lastname: el-Masdouri
authors.forename: A
authors.initials: A
authors.lastname: Aubry
authors.forename: E
authors.initials: E
authors.lastname: Gomez
authors.forename: B
authors.initials: B
authors.lastname: Vitoux
authors.forename: M
authors.initials: M
authors.lastname: Marraud
mesh_terms: D000595:Amino Acid Sequence; D003460:Crystallization; D004151:Dipeptides / Q000737:chemistry*; D008956:Models, Chemical; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D004151:Dipeptides; D010455:Peptides; C075143:N-isobutylidenedipivalamide