2a',8a'-Dichloro-3,8-dioxo-1',2',2a',8a'-tetrahydrodispiro[cyclopropane-1,1'-cyclobuta[<i>b</i>]naphthalene-2',1''-cyclopropane]
Anwar Usman; Hoong-Kun Fun; Lei Wang; Yan Zhang; Jian-Hua Xu; Acta Crystallographica Section E 58 (2002) o1463–o1465; doi:10.1107/S1600536802021785

data_2201511
_publ_section_title
2a',8a'-Dichloro-3,8-dioxo-1',2',2a',8a'-tetrahydrodispiro[cyclopropane-1,1'-cyclobuta[<i>b</i>]naphthalene-2',1''-cyclopropane]
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1463
_journal_page_last               o1465
_journal_paper_doi               10.1107/S1600536802021785
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C16 H12 Cl2 O2'
_chemical_formula_moiety         'C16 H12 Cl2 O2'
_chemical_formula_sum            'C16 H12 Cl2 O2'
_chemical_formula_weight         307.16
_chemical_melting_point          432.0(10)
_chemical_name_systematic
;
2a',8a'-Dichloro-3,8-dioxo-1',2',2a',8a'-tetrahydrodispiro[cyclopropane-
1,1'- cyclobuta[b]napthalene-2',1"-cyclopropane]
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                85.47
_cell_angle_beta                 73.3060(10)
_cell_angle_gamma                69.4010(10)
_cell_formula_units_Z            2
_cell_length_a                   7.24300(10)
_cell_length_b                   10.0455(2)
_cell_length_c                   10.0831(2)
_cell_measurement_reflns_used    3828
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      28.30
_cell_measurement_theta_min      3.13
_cell_volume                     657.59(2)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        'SAINT and SADABS'
_computing_molecular_graphics    SHELXTL
_computing_publication_material
;
SHELXTL, PARST (Nardelli, 1995) and PLATON (Spek, 1990)
;
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      213(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.958
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type
;
Siemens SMART CCD area-detector
;
_diffrn_measurement_method       \w
_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  0.0655
_diffrn_reflns_av_sigmaI/netI    0.1143
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            3750
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         3.13
_diffrn_standards_decay_%        negligible
_diffrn_standards_interval_count none
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.490
_exptl_absorpt_correction_T_max  0.8280
_exptl_absorpt_correction_T_min  0.7916
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.551
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.46
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.974
_refine_diff_density_min         -1.218
_refine_ls_extinction_coef       0.68(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         2753
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0819
_refine_ls_R_factor_gt           0.0782
_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^)+(0.1250P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1950
_refine_ls_wR_factor_ref         0.1988
_reflns_number_gt                2464
_reflns_number_total             2753
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh6019.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'Triclinic' changed to 'triclinic'
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_database_code               2201511
_cod_database_fobs_code          2201511