Solution and Solid-State Models of Peptide CH...O Hydrogen Bonds
Paul W. Baures; Alicia M. Beatty; Muthu Dhanasekaran; Brian A. Helfrich; Waleska Pérez-Segarra; John Desper; Journal of the American Chemical Society 124 (2002) 11315–11323; doi:10.1021/ja0257366

data_4115153
_publ_section_title
;
 Solution and Solid-State Models of Peptide CH...O Hydrogen Bonds
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11315
_journal_page_last               11323
_journal_paper_doi               10.1021/ja0257366
_journal_volume                  124
_journal_year                    2002
_chemical_formula_moiety
;
C12 H15 N O3
;
_chemical_formula_sum            'C12 H15 N O3'
_chemical_formula_weight         221.25
_chemical_name_systematic
;
N-(phenylacetyl)glycine ethyl ester
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9748(18)
_cell_length_b                   12.130(2)
_cell_length_c                   9.5533(16)
_cell_measurement_reflns_used    833
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      27.1
_cell_measurement_theta_min      2.7
_cell_volume                     1155.9(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.954
_diffrn_measured_fraction_theta_max 0.954
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0314
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            7932
_diffrn_reflns_theta_full        28.26
_diffrn_reflns_theta_max         28.26
_diffrn_reflns_theta_min         2.64
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_description       prism
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.114
_refine_diff_density_min         -0.160
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         1445
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0333
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0360P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0688
_refine_ls_wR_factor_ref         0.0732
_reflns_number_gt                1106
_reflns_number_total             1445
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0257366_s2_3.cif
_cod_data_source_block           Glycine-N-(phenylacetyl)_ethyl_ester_(3).
_cod_database_code               4115153