Pseudoacids. II. 2-Acylbenzoic Acid Derivatives
Valente, E. J.; Martin, S. B.; Sullivan, L. D.; Acta Crystallographica Section B 54 (1998) 264–276; doi:10.1107/S0108768197012020

data_2105578
_publ_section_title
;
 Pseudoacids. II. 2-Acylbenzoic Acid Derivatives
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              264
_journal_page_last               276
_journal_paper_doi               10.1107/S0108768197012020
_journal_volume                  54
_journal_year                    1998
_chemical_formula_sum            'C16 H10 O5'
_chemical_formula_weight         282.24
_chemical_name_common            'o-formylbenzoic pseudoanhydride'
_chemical_name_systematic
;
 bis(1(3H)-isobenzofuranone-3-yl)ether
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-I 2ya'
_symmetry_space_group_name_H-M   'I 1 2/a 1'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 101.61(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   15.31(2)
_cell_length_b                   6.111(12)
_cell_length_c                   28.30(5)
_cell_measurement_reflns_used    40
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      20.0
_cell_measurement_theta_min      12.5
_cell_volume                     2594(8)
_computing_cell_refinement       'P3 (Siemens Analytical Xray Inst. Inc.)'
_computing_data_collection       'P3 (Siemens Analytical Xray Inst. Inc.)'
_computing_data_reduction        'XDISK (Siemens Analytical Xray Inst. Inc.)'
_computing_molecular_graphics    'XP (Siemens Analytical Xray Inst. Inc.)'
_computing_publication_material  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measurement_device       'scintillation counter, PH analysis'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1166
_diffrn_reflns_av_sigmaI/netI    0.3531
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            1937
_diffrn_reflns_theta_max         22.51
_diffrn_reflns_theta_min         2.72
_diffrn_standards_decay_%        6(4)
_diffrn_standards_interval_count 97
_diffrn_standards_interval_time  90
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.446
_exptl_crystal_density_meas      ?
_exptl_crystal_description       needle
_exptl_crystal_F_000             1168
_exptl_crystal_size_max          1.00
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.296
_refine_diff_density_min         -0.237
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.618
_refine_ls_goodness_of_fit_obs   1.297
_refine_ls_hydrogen_treatment    'H atoms fixed, calculated'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         1674
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_restrained_S_obs      1.297
_refine_ls_R_factor_all          0.2084
_refine_ls_R_factor_obs          0.0678
_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^)+(0.0650P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.2821
_refine_ls_wR_factor_obs         0.1431
_reflns_number_observed          404
_reflns_number_total             1680
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            fr0002.cif
_cod_data_source_block           8
_cod_depositor_comments
;
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^2^)+(0.0650P)^2^+0.0000P] 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^)+(0.0650P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        2593.(8)
_cod_original_sg_symbol_H-M      'I 2/a'
_cod_database_code               2105578