Crystal structure of 1-(8-methoxy-2<i>H</i>-chromen-3-yl)ethanone
Koh, Dongsoo; Acta Crystallographica Section E 70 (2014) o936–o937; doi:10.1107/S1600536814016808

data_2239833
_publ_section_title
;
 Crystal structure of 1-(8-methoxy-2<i>H</i>-chromen-3-yl)ethanone
;
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o936
_journal_page_last               o937
_journal_paper_doi               10.1107/S1600536814016808
_journal_volume                  70
_journal_year                    2014
_chemical_formula_iupac          'C12 H12 O3'
_chemical_formula_moiety         'C12 H12 O3'
_chemical_formula_sum            'C12 H12 O3'
_chemical_formula_weight         204.22
_chemical_name_systematic
;
1-(8-Methoxy-2<i>H</i>-chromen-3-yl)ethanone
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.1000(4)
_cell_length_b                   12.7455(9)
_cell_length_c                   15.1300(10)
_cell_measurement_reflns_used    4995
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.27
_cell_measurement_theta_min      2.69
_cell_volume                     983.48(12)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT (Bruker, 2000)'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_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  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0317
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7256
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.379
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             432
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.299
_refine_diff_density_min         -0.360
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.151
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         2439
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.151
_refine_ls_R_factor_all          0.0704
_refine_ls_R_factor_gt           0.0414
_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^)+(0.0443P)^2^+0.8069P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0909
_refine_ls_wR_factor_ref         0.1483
_reflns_number_gt                1943
_reflns_number_total             2439
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            tk5330sup1.cif
_cod_data_source_block           I
_cod_database_code               2239833
_cod_database_fobs_code          2239833