3,3a-Dihydrocyclopenta[<i>b</i>]chromen-1(2<i>H</i>)-ones from the reaction of salicylaldehyde and 2-cyclopenten-1-one
Huo, Fang-Jun; Yin, Cai-Xia; Jin, Xiang-Lin; Yang, Pin; Acta Crystallographica Section C 61 (2005) o332–o335; doi:10.1107/S0108270105008528

data_2014873
_publ_section_title
;
 3,3a-Dihydrocyclopenta[<i>b</i>]chromen-1(2<i>H</i>)-ones from the
 reaction of salicylaldehyde and 2-cyclopenten-1-one
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o332
_journal_page_last               o335
_journal_paper_doi               10.1107/S0108270105008528
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C12 H10 O2'
_chemical_formula_moiety         'C12 H10 O2'
_chemical_formula_sum            'C12 H10 O2'
_chemical_formula_weight         186.20
_chemical_melting_point          388
_chemical_name_common            3,3a-Dihydro-2H-cyclopenta[b]chromen-1-one
_chemical_name_systematic
;
3,3a-dihydro-2H-cyclopenta[b]chromen-1-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 91.254(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.8015(14)
_cell_length_b                   7.6260(19)
_cell_length_c                   20.661(5)
_cell_measurement_reflns_used    5211
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      26.92
_cell_measurement_theta_min      2.85
_cell_volume                     913.9(4)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2000)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean '100x100 microns'
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Bruker 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  0.0161
_diffrn_reflns_av_sigmaI/netI    0.0203
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            4188
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.97
_diffrn_standards_decay_%        4.20
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9775
_exptl_absorpt_correction_T_min  0.7227
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.353
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.73
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.237
_refine_diff_density_min         -0.222
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         1579
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0538
_refine_ls_R_factor_gt           0.0463
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0656P)^2^+0.2252P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1202
_refine_ls_wR_factor_ref         0.1263
_reflns_number_gt                1324
_reflns_number_total             1579
_reflns_threshold_expression     'I>2 \s(I)'
_cod_data_source_file            sk1811.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/n'
_cod_database_code               2014873
_cod_database_fobs_code          2014873