(+)-3,11-Dioxoandrost-4-ene-17β-carboxylic acid: catemeric hydrogen bonding in a steroidal keto acid
Newman, Jacob M.; Lalancette, Roger A.; Thompson, Hugh W.; Acta Crystallographica Section C 58 (2002) o402–o404; doi:10.1107/S0108270102009393

data_2012807
_publ_section_title
;
 (+)-3,11-Dioxoandrost-4-ene-17\b-carboxylic acid: catemeric hydrogen
 bonding in a steroidal keto acid
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o402
_journal_page_last               o404
_journal_paper_doi               10.1107/S0108270102009393
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C20 H26 O4'
_chemical_formula_moiety         'C20 H26 O4'
_chemical_formula_sum            'C20 H26 O4'
_chemical_formula_weight         330.41
_chemical_melting_point          543
_chemical_name_systematic
;
 (+)-3,11-Dioxoandrost-4-ene-17\b-carboxylic 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'
_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                 94.98(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.699(2)
_cell_length_b                   11.409(3)
_cell_length_c                   11.764(3)
_cell_measurement_reflns_used    36
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      11.3
_cell_measurement_theta_min      3.5
_cell_volume                     895.7(4)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Siemens P4'
_diffrn_measurement_method       2\q/\q
_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  0.057
_diffrn_reflns_av_sigmaI/netI    0.063
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3582
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.49
_diffrn_standards_decay_%        'variation <3.5'
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.97
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(Sheldrick, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.225
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.11
_refine_diff_density_min         -0.11
_refine_ls_extinction_coef       0.0187(17)
_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   1.07
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         1658
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.07
_refine_ls_R_factor_all          0.063
_refine_ls_R_factor_gt           0.041
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0103P)^2^+0.0570P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.077
_refine_ls_wR_factor_ref         0.085
_reflns_number_gt                1245
_reflns_number_total             1657
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fr1378.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (2 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (2
times).

'_geom_angle_publ_flag' value 'Y' changed to 'y' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (2 times).

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               2012807
_cod_database_fobs_code          2012807