Crystal structure of 2,2'-(1,2-ethylenedioxy)bisbenzaldehyde O,O'-dimethyldioxime, C18H20N2O4
Yu-Jie Zhang; Shou-Ting Zhang; Jiao Wang; Guo-Hua Liu; Gang Wang; Xiong-Hou Gao; Zeitschrift für Kristallographie - New Crystal Structures 227 (2012) 119–; doi:

data_8103318
_publ_section_title
;
 Crystal structure of 2,2'-(1,2-ethylenedioxy)bisbenzaldehyde
 O,O'-dimethyldioxime, C18H20N2O4
;
_journal_issue                   2
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              119
_journal_volume                  227
_journal_year                    2012
_chemical_formula_moiety         'C18 H20 N2 O4'
_chemical_formula_sum            'C18 H20 N2 O4'
_chemical_formula_weight         328.36
_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                 100.2680(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.674(2)
_cell_length_b                   8.1642(8)
_cell_length_c                   10.4029(9)
_cell_measurement_reflns_used    1407
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      20.043
_cell_measurement_theta_min      2.689
_cell_volume                     1727.8(3)
_computing_cell_refinement       'Bruker SMART(Siemens, 1996)'
_computing_data_collection       'Bruker SMART (Siemens, 1996)'
_computing_data_reduction        'Bruker SAINT (Siemens, 1996)'
_computing_molecular_graphics    'Bruker SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'Bruker SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'smart 1000 CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0487
_diffrn_reflns_av_sigmaI/netI    0.1199
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            8438
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.69
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9822
_exptl_absorpt_correction_T_min  0.9623
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'sadabs (Sheldrick, 1996)'
_exptl_crystal_colour            pale-yellow
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block-like
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.152
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         3058
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.1241
_refine_ls_R_factor_gt           0.0504
_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^)+(0.0164P)^2^+0.3281P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1278
_refine_ls_wR_factor_ref         0.1835
_reflns_number_gt                1486
_reflns_number_total             3058
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1267-3654.cff
_cod_data_source_block           110810a
_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_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        1727.7(3)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               8103318