<i>trans</i>-3-Acetyl-5-benzoyl-2-methyl-4-phenyl-4,5-dihydrofuran at 150K
M. Subha Nandhini; R. V. Krishnakumar; A. Mostad; S. Renuga; S. Selvaraj; S. Perumal; S. Natarajan; Acta Crystallographica Section E 59 (2003) o1321–o1323; doi:10.1107/S1600536803017938

data_2202959
_publ_section_title
;
 <i>trans</i>-3-Acetyl-5-benzoyl-2-methyl-4-phenyl-4,5-dihydrofuran at
 150K
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1321
_journal_page_last               o1323
_journal_paper_doi               10.1107/S1600536803017938
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C20 H18 O3'
_chemical_formula_moiety         'C20 H18 O3'
_chemical_formula_sum            'C20 H18 O3'
_chemical_formula_weight         306.34
_chemical_name_systematic
;
trans-3-Acetyl-5-benzoyl-2-methyl-4-phenyl-4,5-dihydrofuran
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 113.023(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.846(2)
_cell_length_b                   10.564(2)
_cell_length_c                   16.340(3)
_cell_measurement_reflns_used    1024
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.3
_cell_measurement_theta_min      2.15
_cell_volume                     1564.2(5)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'PLATON (Spek, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.948
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'Bruker SMART CCD'
_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  0.0359
_diffrn_reflns_av_sigmaI/netI    0.0277
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            21162
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         2.25
_diffrn_standards_number         7923
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.95
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 1998)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.445
_refine_diff_density_min         -0.421
_refine_ls_extinction_coef       0.0025(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.082
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         4750
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.082
_refine_ls_R_factor_all          0.0680
_refine_ls_R_factor_gt           0.0510
_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^)+(0.0745P)^2^+0.5171P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1373
_refine_ls_wR_factor_ref         0.1493
_reflns_number_gt                3623
_reflns_number_total             4750
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            wn6179.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/c'
_cod_database_code               2202959
_cod_database_fobs_code          2202959