Photoproducts Derived from 9-Substituted Dibenzobarrelenes
Muneer, M.; Rath, Nigam P.; George, M. V.; Acta Crystallographica Section C 53 (1997) 1475–1478; doi:10.1107/S0108270197006343

data_2006551
_publ_section_title
;
 Photoproducts Derived from 9-Substituted Dibenzobarrelenes
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1475
_journal_page_last               1478
_journal_paper_doi               10.1107/S0108270197006343
_journal_volume                  53
_journal_year                    1997
_chemical_formula_sum            'C31 H22 O3'
_chemical_formula_weight         442.49
_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'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 97.8270(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.81440(10)
_cell_length_b                   9.14810(10)
_cell_length_c                   27.8748(3)
_cell_measurement_reflns_used    8192
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      18.0
_cell_measurement_theta_min      2.0
_cell_volume                     2226.74(4)
_computing_cell_refinement       'SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL-Plus
_computing_publication_material  SHELXTL-Plus
_computing_structure_refinement  SHELXTL-Plus
_computing_structure_solution    'SHELXTL-Plus (Sheldrick, 1995)'
_diffrn_ambient_temperature      298(2)
_diffrn_measurement_device       'Siemens SMART'
_diffrn_measurement_method       '\w 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  0.045
_diffrn_reflns_av_sigmaI/netI    0.040
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            15746
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.33
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.320
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       Irregular
_exptl_crystal_F_000             928
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.21
_refine_diff_density_min         -0.25
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.01
_refine_ls_goodness_of_fit_obs   1.07
_refine_ls_matrix_type           full
_refine_ls_number_parameters     311
_refine_ls_number_reflns         4319
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.04
_refine_ls_restrained_S_obs      1.07
_refine_ls_R_factor_all          0.084
_refine_ls_R_factor_obs          .048
_refine_ls_shift/esd_max         0.0
_refine_ls_shift/esd_mean        0.0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0495P)^2^+0.7533P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.128
_refine_ls_wR_factor_obs         .104
_reflns_number_observed          2896
_reflns_number_total             4380
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            bk1278.cif
_cod_data_source_block           2a
_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 

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 'calc w =
1/[\s^2^(Fo^2^)+(0.0495P)^2^+0.7533P] 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^)+(0.0495P)^2^+0.7533P] 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/c'
_cod_database_code               2006551