Conformational Flexibility in <i>N</i>-Benzylideneanilines
Clegg, W.; Elsegood, M. R. J.; Heath, S. L.; Houlton, A.; Shipman, M. A.; Acta Crystallographica Section C 52 (1996) 2548–2552; doi:10.1107/S0108270196009225

data_2005457
_publ_section_title
;
 Conformational Flexibility in <i>N</i>-Benzylideneanilines
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2548
_journal_page_last               2552
_journal_paper_doi               10.1107/S0108270196009225
_journal_volume                  52
_journal_year                    1996
_chemical_formula_sum            'C14 H12 N2 O3'
_chemical_formula_weight         256.26
_chemical_name_systematic
;
 p-nitro-N-(p-methoxybenzylidene)aniline
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.000(2)
_cell_angle_beta                 99.642(2)
_cell_angle_gamma                90.000(2)
_cell_formula_units_Z            8
_cell_length_a                   11.4508(10)
_cell_length_b                   7.3793(7)
_cell_length_c                   29.047(3)
_cell_measurement_reflns_used    6209
_cell_measurement_temperature    160(2)
_cell_measurement_theta_max      27.97
_cell_measurement_theta_min      2.85
_cell_volume                     2419.8(4)
_computing_cell_refinement       'local programs'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and local programs'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1994)'
_diffrn_ambient_temperature      160(2)
_diffrn_measurement_device       'Siemens SMART CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_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  0.0345
_diffrn_reflns_av_sigmaI/netI    0.0287
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            12225
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.42
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.407
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.231
_refine_diff_density_min         -0.200
_refine_ls_extinction_coef       0.0027(4)
_refine_ls_extinction_method     'SHELXTL (Sheldrick, 1995)'
_refine_ls_goodness_of_fit_all   1.063
_refine_ls_goodness_of_fit_obs   1.077
_refine_ls_hydrogen_treatment    'H atoms riding (see below)'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     346
_refine_ls_number_reflns         4260
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_restrained_S_obs      1.077
_refine_ls_R_factor_all          0.0560
_refine_ls_R_factor_obs          0.0386
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0487P)^2^+0.7611P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1061
_refine_ls_wR_factor_obs         0.0937
_reflns_number_observed          3314
_reflns_number_total             4260
_reflns_observed_criterion       >2\s(I)
_cod_data_source_file            ab1402.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0487P)^2^+0.7611P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0487P)^2^+0.7611P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2005457