Bonded peri-interactions govern the rate of racemisation of atropisomeric 8-substituted 1-naphthamides†
Clayden, Jonathan; McCarthy, Catherine; Helliwell, Madeleine; Chemical Communications  (1999) 2059–; doi:10.1039/a906398f

data_7110683
_publ_section_title
;
 Bonded peri-interactions govern the rate of racemisation of atropisomeric
 8-substituted 1-naphthamides&#x2020;
;
_journal_issue                   20
_journal_name_full               'Chemical Communications'
_journal_page_first              2059
_journal_paper_doi               10.1039/a906398f
_journal_year                    1999
_chemical_formula_moiety         'C18 H23 N O2 '
_chemical_formula_sum            'C18 H23 N O2'
_chemical_formula_weight         285.39
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_audit_creation_date             1998-06-15
_audit_creation_method           'by teXsan v1.7'
_audit_update_record             ?
_cell_angle_alpha                90
_cell_angle_beta                 97.53(1)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.956(1)
_cell_length_b                   14.530(1)
_cell_length_c                   14.392(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296.2
_cell_measurement_theta_max      16.9
_cell_measurement_theta_min      14.4
_cell_volume                     1649.4(3)
_computing_cell_refinement       'MSC/AFC Diffractometer Control'
_computing_data_collection       'MSC/AFC Diffractometer Control'
_computing_data_reduction        'teXsan (MSC, 1995)'
_computing_publication_material  'teXsan (MSC, 1995)'
_computing_structure_refinement  'teXsan (MSC, 1995)'
_computing_structure_solution
;
SIR92 (Altomare, et. al. 1993)
;
_diffrn_ambient_temperature      296.2
_diffrn_measurement_device       'Rigaku AFC5R'
_diffrn_measurement_method       \w-2\q
_diffrn_orient_matrix_UB_11      -0.03092
_diffrn_orient_matrix_UB_12      0.05981
_diffrn_orient_matrix_UB_13      -0.03216
_diffrn_orient_matrix_UB_21      0.04373
_diffrn_orient_matrix_UB_22      0.03389
_diffrn_orient_matrix_UB_23      0.05868
_diffrn_orient_matrix_UB_31      0.11493
_diffrn_orient_matrix_UB_32      0.00322
_diffrn_orient_matrix_UB_33      -0.02084
_diffrn_radiation_detector       'scintillation counter'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rigaku rotating anode'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  0.02207
_diffrn_reflns_av_sigmaI/netI    0.040
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            3741
_diffrn_reflns_reduction_process 'Lp corrections applied'
_diffrn_reflns_theta_max         79.67
_diffrn_reflns_theta_min         3.04
_diffrn_standards_decay_%        1.16
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.586
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.880
_exptl_absorpt_correction_type
;
\y scans (North,Phillips & Matthews, 1968)
;
_exptl_crystal_colour            colourlesstabular
_exptl_crystal_density_diffrn    1.149
_exptl_crystal_density_meas      ?
_exptl_crystal_description       tabular
_exptl_crystal_F_000             616.00
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.18
_refine_diff_density_min         -0.18
_refine_ls_extinction_coef       0.0000048(2)
_refine_ls_extinction_expression 'equ(3) Acta Cryst.(1968) A24, p213.'
_refine_ls_extinction_method     'Zachariasen (1967)'
_refine_ls_goodness_of_fit_all   3.405
_refine_ls_goodness_of_fit_obs   3.803
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     283
_refine_ls_number_reflns         2654
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0660
_refine_ls_R_factor_obs          0.0485
_refine_ls_shift/esd_max         0.0020
_refine_ls_shift/esd_mean        0.0910
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1/[\s^2^(Fo) + 0.00000|Fo|^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0332
_refine_ls_wR_factor_obs         0.0326
_reflns_number_observed          2654
_reflns_number_total             3494
_reflns_observed_criterion       >2.00\s(I)
_cod_data_source_file            906398fsup1.cif
_cod_data_source_block           3
_cod_depositor_comments
;
 Renaming the _geom_torsion_site_symmetry_4 data item to _geom_torsion.
 The initial data name misassignment was cause by the incorrect data name
 order in the loop and the removal of data items containing only unknown
 ('?') or inapplicable ('.') values.

 Antanas Vaitkus,
 2018-08-08

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'w = 1/[\s^2^(Fo) +
0.00000|Fo|^2^]' 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) + 0.00000|Fo|^2^]'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1649.3(4)
_cod_original_sg_symbol_H-M      'P 21/n     '
_cod_original_formula_sum        'C18 H23 N O2 '
_cod_database_code               7110683