Diels–Alder adducts of maleic anhydride and dienes: new compounds by crystallization
Bolte, Michael; Degen, Alexander; Egert, Ernst; Acta Crystallographica Section C 56 (2000) 1338–1342; doi:10.1107/S0108270100010131

data_2011572
_publ_section_title
;
 Diels--Alder adducts of maleic anhydride and dienes: new compounds by
 crystallization
;
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1338
_journal_page_last               1342
_journal_paper_doi               10.1107/S0108270100010131
_journal_volume                  56
_journal_year                    2000
_chemical_formula_moiety         'C9 H4 Cl6 O4'
_chemical_formula_sum            'C9 H4 Cl6 O4'
_chemical_formula_weight         388.82
_chemical_name_systematic
;
1,2,3,4,7,7-hexachlorobicyclo[2.2.1]hept-2-ene-endo-cis-5,6-dicarboxylic acid
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 101.650(10)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.4990(10)
_cell_length_b                   7.924(2)
_cell_length_c                   11.873(2)
_cell_measurement_reflns_used    511
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      1
_cell_volume                     691.0(2)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 1991)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens CCD three-circle'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .025
_diffrn_reflns_av_sigmaI/netI    .017
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            19175
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.75
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  1200
_diffrn_standards_number         325
_exptl_absorpt_coefficient_mu    1.246
_exptl_absorpt_correction_T_max  .835
_exptl_absorpt_correction_T_min  .636
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.869
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             384
_exptl_crystal_size_max          .40
_exptl_crystal_size_mid          .30
_exptl_crystal_size_min          .15
_refine_diff_density_max         .28
_refine_diff_density_min         -.21
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack   .02(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     180
_refine_ls_number_reflns         3424
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          .020
_refine_ls_R_factor_gt           .019
_refine_ls_shift/su_max          .001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.03P)^2^+0.0924P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .048
_reflns_number_gt                3293
_reflns_number_total             3424
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1412.cif
_cod_data_source_block           IVa
_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_sg_symbol_H-M      'P 21'
_cod_database_code               2011572
_cod_database_fobs_code          2011572