Crystal structures of benzil monoximes controlled through configurational isomerism, molecular substitution and external complexation
Klein, Cornelia; Fischer, Conrad; Seichter, Wilhelm; Schwarzer, Anke; Weber, Edwin; CrystEngComm 13 (2011) 1931–; doi:10.1039/c0ce00620c

data_7210520
_publ_section_title
;
 Crystal structures of benzil monoximes controlled through configurational
 isomerism, molecular substitution and external complexation
;
_journal_issue                   6
_journal_name_full               CrystEngComm
_journal_page_first              1931
_journal_paper_doi               10.1039/c0ce00620c
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C16 H15 N O4'
_chemical_formula_sum            'C16 H15 N O4'
_chemical_formula_weight         285.29
_chemical_name_common
;
1,2-Bis-(4-methoxy-phenyl)-ethane-1,2-dione monooxime
;
_chemical_name_systematic
;
1,2-Bis-(4-methoxy-phenyl)-ethane-1,2-dione monooxime
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.015(1)
_cell_length_b                   7.3126(13)
_cell_length_c                   31.207(6)
_cell_measurement_reflns_used    7766
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      28.64
_cell_measurement_theta_min      2.61
_cell_volume                     1372.6(4)
_computing_cell_refinement       SAINT-NT
_computing_data_collection       'Kappa APEX 2 (Bruker AXS)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'ORTEP-3 (Farrugia)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      93(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  '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  0.0924
_diffrn_reflns_av_sigmaI/netI    0.0466
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            24887
_diffrn_reflns_theta_full        26.49
_diffrn_reflns_theta_max         26.49
_diffrn_reflns_theta_min         1.31
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.381
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       splitter
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.38
_refine_diff_density_max         0.370
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.083
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.097
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         2847
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.0861
_refine_ls_R_factor_gt           0.0733
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0334P)^2^+4.2791P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1662
_refine_ls_wR_factor_ref         0.1709
_reflns_number_gt                2471
_reflns_number_total             2847
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0ce00620c.txt
_cod_data_source_block           cokl6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to the built-in table from CIF Core
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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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 
;
_cod_database_code               7210520