3-Benzylidene-8-methoxy-6-(prop-1-enyl)chroman-4-one
R. Suresh; Charles C. Kanagam; P. R. Umarani; V. Manivannan; Büyükgüngör, Orhan; Acta Crystallographica Section E 63 (2007) o4387–o4387; doi:10.1107/S1600536807051161

data_2215815
_publ_section_title
;
 3-Benzylidene-8-methoxy-6-(prop-1-enyl)chroman-4-one
;
_journal_coeditor_code           BT2548
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o4387
_journal_page_last               o4387
_journal_paper_doi               10.1107/S1600536807051161
_journal_volume                  63
_journal_year                    2007
_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
;
3-Benzylidene-8-methoxy-6-(prop-1-enyl)chroman-4-one
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 98.690(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0763(8)
_cell_length_b                   6.9018(7)
_cell_length_c                   22.1841(18)
_cell_measurement_reflns_used    9395
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.22
_cell_measurement_theta_min      1.86
_cell_volume                     1525.1(2)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2002)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2002)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.938
_diffrn_measured_fraction_theta_max 0.938
_diffrn_measurement_device_type  'Stoe IPDS2'
_diffrn_measurement_method       'rotation method'
_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  0.1331
_diffrn_reflns_av_sigmaI/netI    0.1213
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            11793
_diffrn_reflns_theta_full        27.17
_diffrn_reflns_theta_max         27.17
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.9947
_exptl_absorpt_correction_T_min  0.9842
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   '(X-RED32; Stoe & Cie, 2002)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.334
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.283
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.917
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         3177
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.917
_refine_ls_R_factor_all          0.1434
_refine_ls_R_factor_gt           0.0679
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0793P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1491
_refine_ls_wR_factor_ref         0.1826
_reflns_number_gt                1494
_reflns_number_total             3177
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt2548.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2215815
_cod_database_fobs_code          2215815