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_2300567
_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         'C18 H17 Cu O6'
_chemical_formula_sum            'C18 H17 Cu O6'
_chemical_formula_weight         392.86
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 94.7996(11)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   9.7935(7)
_cell_length_b                   19.0055(13)
_cell_length_c                   18.2997(13)
_cell_measurement_reflns_used    9918
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.3845
_cell_measurement_theta_min      2.2335
_cell_volume                     3394.2(4)
_computing_cell_refinement       'SAINT V8.30C'
_computing_data_collection       'APEX2 v2012.2'
_computing_data_reduction        'SAINT V8.30C'
_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 0.998
_diffrn_measurement_device_type  'Bruker Smart APEX II Quazar'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0282
_diffrn_reflns_av_unetI/netI     0.0189
_diffrn_reflns_laue_measured_fraction_full 1.000
_diffrn_reflns_laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            29203
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.426
_diffrn_reflns_theta_min         2.143
_diffrn_source                   'INCOATEC Microsource'
_exptl_absorpt_coefficient_mu    1.318
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6951
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS-2015/1
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_description       block
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.140
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.390
_refine_diff_density_min         -0.281
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     300
_refine_ls_number_reflns         4282
_refine_ls_number_restraints     652
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.0342
_refine_ls_R_factor_gt           0.0273
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0250P)^2^+6.0544P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0676
_refine_ls_wR_factor_ref         0.0704
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3723
_reflns_number_total             4282
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ks5494sup1.cif
_cod_data_source_block           3_uncorr
_cod_database_code               2300567
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.837
_shelx_estimated_absorpt_t_max   0.937
_shelx_res_checksum              56773
_shelx_hkl_checksum              67195
_cod_database_fobs_code 2300567