2,3-Dihydro-3,3-dimethylspiro[1<i>H</i>-4-oxanthracene-5,2'-oxiran]-10(5<i>H</i>)-one
Ferreira, Vitor F.; Pinto, Antonio V.; Pinto, Maria C. R. F.; da Silva, Milton N.; Skakle, J. M. S.; de Souza, Maria C. B. V.; Wardell, Solange M. S. V.; Acta Crystallographica Section C 58 (2002) o560–o562; doi:10.1107/S0108270102013665

data_2012959
_publ_section_title
2,3-Dihydro-3,3-dimethylspiro[1<i>H</i>-4-oxanthracene-5,2'-oxiran]-10(5<i>H</i>)-one
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o560
_journal_page_last               o562
_journal_paper_doi               10.1107/S0108270102013665
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'C16 H16 O3'
_chemical_formula_sum            'C16 H16 O3'
_chemical_formula_weight         256.29
_chemical_name_systematic
;
2,3-Dihydro-3,3-dimethylspiro[1H-4-oxanthracene-5,2'-oxiran]-10(5H)-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 101.666(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.2764(13)
_cell_length_b                   7.8543(9)
_cell_length_c                   13.6935(15)
_cell_measurement_reflns_used    4478
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      32.34
_cell_measurement_theta_min      3.39
_cell_volume                     1293.1(2)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        SAINT
_computing_molecular_graphics
;
ORTEX in OSCAIL (McArdle, 1994, 2000) and ORTEPIII for Windows (Farrugia,
1997)
;
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      292(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker SMART 1000 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  0.040
_diffrn_reflns_av_sigmaI/netI    0.033
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            12411
_diffrn_reflns_theta_full        32.56
_diffrn_reflns_theta_max         32.56
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.928
_exptl_absorpt_correction_T_min  0.826
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2000)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.39
_refine_diff_density_min         -0.23
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         4627
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.098
_refine_ls_R_factor_gt           0.059
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0895P)^2^+0.2537P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.157
_refine_ls_wR_factor_ref         0.187
_reflns_number_gt                2879
_reflns_number_total             4627
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1577.cif
_cod_data_source_block           IV
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Yes' changed to 'yes' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (10 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Yes' changed to 'yes' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (10
times).

'_geom_angle_publ_flag' value 'Yes' changed to 'yes'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (8
times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2012959
_cod_database_fobs_code          2012959