2-Benzyl-1-hydroxy-5,6-dihydro-3<i>H</i>-naphtho[2,1-<i>b</i>]pyran-3-one
Wentrup, Curt; Buchanan, Jeff; Karl A. Byriel; Colin H. L. Kennard; Acta Crystallographica Section E 60 (2004) o471–o472; doi:10.1107/S1600536804003848

data_2203304
_publ_section_title
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 2-Benzyl-1-hydroxy-5,6-dihydro-3<i>H</i>-naphtho[2,1-<i>b</i>]pyran-3-one
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_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o471
_journal_page_last               o472
_journal_paper_doi               10.1107/S1600536804003848
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C20 H16 O3'
_chemical_formula_moiety         'C20 H16 O3'
_chemical_formula_sum            'C20 H16 O3'
_chemical_formula_weight         304.33
_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                   9.039(2)
_cell_length_b                   8.175(2)
_cell_length_c                   20.304(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      10
_cell_volume                     1500.3(5)
_computing_cell_refinement       SDP
_computing_data_collection       'SDP (Frenz, 1985)'
_computing_data_reduction        'WinGX (Farrugia, 1999)'
_computing_molecular_graphics    'PLATON98 (Spek, 1988)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  SHELXL97
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf-Nonius CAD-4'
_diffrn_measurement_method       w-2\q
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0279
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1526
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.01
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9925
_exptl_absorpt_correction_T_min  0.9651
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North et al., 1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.347
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'hexagonal plate'
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.118
_refine_diff_density_min         -0.152
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack
' meaningless value, as only C, H, O present 3.2(19)'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.934
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         1528
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.934
_refine_ls_R_factor_all          0.0526
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0634P)^2^+0.2016P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0805
_refine_ls_wR_factor_ref         0.0938
_reflns_number_gt                1162
_reflns_number_total             1526
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hg6020.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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 
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_cod_database_code               2203304
_cod_database_fobs_code          2203304