An empirical correction for the influence of low-energy contamination
Krause, Lennard; Herbst-Irmer, Regine; Stalke, Dietmar; Journal of Applied Crystallography 48 (2015) 1907–1913; doi:10.1107/S1600576715020440

data_2300569
_publ_section_title
;
 An empirical correction for the influence of low-energy contamination
;
_journal_coeditor_code           KS5494
_journal_issue                   6
_journal_name_full               'Journal of Applied Crystallography'
_journal_page_first              1907
_journal_page_last               1913
_journal_paper_doi               10.1107/S1600576715020440
_journal_volume                  48
_journal_year                    2015
_chemical_formula_moiety         'C34 H26 Mg N4 O4'
_chemical_formula_sum            'C34 H26 Mg N4 O4'
_chemical_formula_weight         578.90
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 93.044(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.3182(14)
_cell_length_b                   14.9745(18)
_cell_length_c                   16.744(2)
_cell_measurement_reflns_used    9930
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.6085
_cell_measurement_theta_min      2.2305
_cell_volume                     2833.8(6)
_computing_cell_refinement       'SAINT V8.34A'
_computing_data_collection       'APEX2 v2012.2'
_computing_data_reduction        'SAINT V8.34A'
_computing_molecular_graphics    'Mercury CSD 3.3 (Build RC5)'
_computing_publication_material  'Mercury CSD 3.3 (Build RC5)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution
'SHELXT (G.M.Sheldrick,Acta Cryst.(2015)A71,3-8)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Smart APEX II Ultra'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0310
_diffrn_reflns_av_unetI/netI     0.0287
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            36495
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.816
_diffrn_reflns_theta_min         1.826
_diffrn_source                   'BRUKER Rotating Anode'
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6789
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS-2015/1
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_description       block
_exptl_crystal_F_000             1208
_exptl_crystal_size_max          0.190
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.110
_refine_diff_density_max         0.447
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     392
_refine_ls_number_reflns         8866
_refine_ls_number_restraints     408
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.0499
_refine_ls_R_factor_gt           0.0403
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0582P)^2^+0.8513P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1046
_refine_ls_wR_factor_ref         0.1112
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7421
_reflns_number_total             8866
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ks5494sup1.cif
_cod_data_source_block           4_filter
_cod_original_cell_volume        2833.9(6)
_cod_database_code               2300569
_cod_database_fobs_code          2300569
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.979
_shelx_estimated_absorpt_t_max   0.988
_shelx_res_checksum              22436
_shelx_hkl_checksum              57153