Flavokavain B from the rhizome of <i>Alpinia mutica</i> Roxb
Sirat, Hasnah Mohd; Jani, Nor Akmalazura; Hazni, Hazrina; Awang, Khalijah; Ng, Seik Weng; Acta Crystallographica Section E 66 (2010) o2866–; doi:10.1107/S1600536810041395

data_2227455
_publ_section_title
;
 Flavokavain B from the rhizome of <i>Alpinia mutica</i> Roxb
;
_journal_coeditor_code           FL2321
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2866
_journal_paper_doi               10.1107/S1600536810041395
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C17 H16 O4'
_chemical_formula_moiety         'C17 H16 O4'
_chemical_formula_sum            'C17 H16 O4'
_chemical_formula_weight         284.30
_chemical_name_systematic
;
(<i>E</i>)-1-(2-Hydroxy-4,6-dimethoxyphenyl)-3-phenylprop-2-en-1-one
;
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.9668(10)
_cell_length_b                   12.305(3)
_cell_length_c                   22.552(5)
_cell_measurement_reflns_used    1135
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      21.7
_cell_measurement_theta_min      3.2
_cell_volume                     1378.3(5)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material  'publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEX diffractometer'
_diffrn_measurement_method       '\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  0.0886
_diffrn_reflns_av_sigmaI/netI    0.0530
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            10723
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         1.81
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'Faint yellow'
_exptl_crystal_density_diffrn    1.370
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.202
_refine_diff_density_min         -0.265
_refine_ls_extinction_coef       0.026(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         1449
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.0690
_refine_ls_R_factor_gt           0.0488
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0736P)^2^+0.0210P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1163
_refine_ls_wR_factor_ref         0.1279
_reflns_number_gt                1162
_reflns_number_total             1449
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fl2321.cif
_cod_data_source_block           I
_cod_database_code               2227455
_cod_database_fobs_code          2227455