Conformational switching caused by biphenyl substitution at the C^{α^} position: ethyl 2-benzyl-2-(formylamino)-3-phenylpropionate and ethyl 3-(1,1'-biphenyl-4-yl)-2-(formylamino)-2-(4-phenylbenzyl)propionate
Lakshminarasimhan Damodharan; Vasantha Pattabhi; Manoranjan Behera; Sambasivarao Kotha; Acta Crystallographica Section C 60 (2004) o527–o530; doi:10.1107/S0108270104013150

data_2014203
_publ_section_title
;
 Conformational switching caused by biphenyl substitution at the
 C^{\a^} position: ethyl 2-benzyl-2-(formylamino)-3-phenylpropionate
 and ethyl
 3-(1,1'-biphenyl-4-yl)-2-(formylamino)-2-(4-phenylbenzyl)propionate
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o527
_journal_page_last               o530
_journal_paper_doi               10.1107/S0108270104013150
_journal_volume                  60
_journal_year                    2004
_chemical_formula_moiety         'C19 H21 N O3'
_chemical_formula_sum            'C19 H21 N O3'
_chemical_formula_weight         311.37
_chemical_name_systematic
;
ethyl 2-benzyl-2-(formylamino)-3-phenylpropionate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 94.147(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.980(2)
_cell_length_b                   11.853(3)
_cell_length_c                   14.575(4)
_cell_measurement_reflns_used    3802
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.9
_cell_measurement_theta_min      2.05
_cell_volume                     1719.6(7)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  reference?
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.950
_diffrn_measured_fraction_theta_max 0.882
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       \w
_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  0.023
_diffrn_reflns_av_sigmaI/netI    0.024
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            13797
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         27.90
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Rectangle
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.42
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.105
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         3802
_refine_ls_number_restraints     75
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.1051
_refine_ls_R_factor_gt           0.0615
_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^)+(0.0598P)^2^+0.3098P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1394
_refine_ls_wR_factor_ref         0.1613
_reflns_number_gt                2295
_reflns_number_total             3802
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            na1665.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2014203
_cod_database_fobs_code          2014203