2,3-Bis(2-chlorobenzyl)naphthalene-1,4-dione
Huang, Shiliang; Huang, Zhi-Shu; Gu, Lian-Quan; Zhou, Zhongyuan; Ng, Seik Weng; Acta Crystallographica Section E 64 (2008) o593–; doi:10.1107/S1600536807068006

data_2217804
_publ_section_title
;
 2,3-Bis(2-chlorobenzyl)naphthalene-1,4-dione
;
_journal_coeditor_code           OB2105
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o593
_journal_paper_doi               10.1107/S1600536807068006
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C24 H16 Cl2 O2'
_chemical_formula_moiety         'C24 H16 Cl2 O2'
_chemical_formula_sum            'C24 H16 Cl2 O2'
_chemical_formula_weight         407.27
_chemical_name_systematic
;
2,3-Bis(2-chlorobenzyl)naphthalene-1,4-dione
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 99.0710(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9980(10)
_cell_length_b                   10.2720(10)
_cell_length_c                   18.804(2)
_cell_measurement_reflns_used    6278
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.2
_cell_volume                     1907.0(3)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2001)'
_computing_molecular_graphics    'X-SEED (Barbour, 2001)'
_computing_publication_material  'publCIF (Westrip, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'medium-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0349
_diffrn_reflns_av_sigmaI/netI    0.0358
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12440
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.18
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.358
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.418
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.5
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.424
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         4366
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0716
_refine_ls_R_factor_gt           0.0442
_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^)+(0.0628P)^2^+0.3578P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1116
_refine_ls_wR_factor_ref         0.1309
_reflns_number_gt                2921
_reflns_number_total             4366
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob2105.cif
_cod_data_source_block           I
_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_enum 1527 2010-12-29 10:47:43Z saulius 

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 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1907.1(3)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2217804
_cod_database_fobs_code          2217804