2-(2,3-Dimethoxyphenyl)chroman-4-one
Hui Wu; Zhou Xu; Jun Zhou; Yongmin Liang; Acta Crystallographica Section E 61 (2005) o1095–o1096; doi:10.1107/S160053680500838X

data_2205591
_publ_section_title
;
 2-(2,3-Dimethoxyphenyl)chroman-4-one
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1095
_journal_page_last               o1096
_journal_paper_doi               10.1107/S160053680500838X
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C17 H16 O4'
_chemical_formula_moiety         'C17 H16 O4'
_chemical_formula_sum            'C17 H16 O4'
_chemical_formula_weight         284.30
_chemical_melting_point          .365E-305
_chemical_name_systematic
;
2-(2,3-Dimethoxyphenyl)chroman-4-one
;
_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   constr
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                107.905(2)
_cell_angle_beta                 108.506(4)
_cell_angle_gamma                92.139(3)
_cell_formula_units_Z            2
_cell_length_a                   7.547(3)
_cell_length_b                   9.122(2)
_cell_length_c                   11.437(3)
_cell_measurement_reflns_used    732
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.939
_cell_measurement_theta_min      2.534
_cell_volume                     702.5(4)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        'SAINT (Siemens, 1996)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997b)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997a)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.0273
_diffrn_reflns_av_sigmaI/netI    0.0674
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3693
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         1.99
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.9830
_exptl_absorpt_correction_T_min  0.9556
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.344
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             300
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.181
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         2443
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.1093
_refine_ls_R_factor_gt           0.0514
_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^)+(0.051P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1065
_refine_ls_wR_factor_ref         0.1260
_reflns_number_gt                1262
_reflns_number_total             2443
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sj6057.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_original_cell_volume        702.4(4)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2205591
_cod_database_fobs_code          2205591