24-Methylenecycloartanone
Xiong, Hui-Ping; Wu, Zhi-Jun; Chen, Fa-Tang; Chen, Wan-Sheng; Acta Crystallographica Section E 66 (2010) o260–o261; doi:10.1107/S1600536809055123

data_2225085
_publ_section_title
;
 24-Methylenecycloartanone
;
_journal_coeditor_code           PK2219
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o260
_journal_page_last               o261
_journal_paper_doi               10.1107/S1600536809055123
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C31 H50 O'
_chemical_formula_moiety         'C31 H50 O'
_chemical_formula_sum            'C31 H50 O'
_chemical_formula_weight         438.71
_chemical_name_systematic
;
24-Methylenecycloartanone
;
_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                 108.542(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.918(5)
_cell_length_b                   10.212(6)
_cell_length_c                   14.077(7)
_cell_measurement_pressure       1
_cell_measurement_reflns_used    829
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.048
_cell_measurement_theta_min      2.218
_cell_volume                     1351.7(12)
_computing_cell_refinement       'SAINT (Bruker, 2005)'
_computing_data_collection       'SMART (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
'Bruker SMART APEX CCD area-detector diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0464
_diffrn_reflns_av_sigmaI/netI    0.0487
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            6145
_diffrn_reflns_theta_full        26.01
_diffrn_reflns_theta_max         26.01
_diffrn_reflns_theta_min         1.53
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.062
_exptl_absorpt_correction_T_max  0.9907
_exptl_absorpt_correction_T_min  0.9756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.078
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.142
_refine_diff_density_min         -0.202
_refine_ls_abs_structure_details 'Flack (1983), 1530 Friedel pairs'
_refine_ls_abs_structure_Flack   6(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.911
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     296
_refine_ls_number_reflns         4360
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.911
_refine_ls_R_factor_all          0.0722
_refine_ls_R_factor_gt           0.0516
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0807P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1240
_refine_ls_wR_factor_ref         0.1334
_reflns_number_gt                2901
_reflns_number_total             4360
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            pk2219.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_sg_symbol_H-M      'P 21'
_cod_database_code               2225085
_cod_database_fobs_code          2225085