5,8-Dimethyl-3-methylene-2-oxo-3,3a,4,5,5a,6,8a,8b-octahydro-2<i>H</i>-1-oxa-s-indacene-5-carbaldehyde
Moumou, Mohamed; Benharref, Ahmed; Berraho, Moha; Daran, Jean-Claude; Akssira, Mohamed; Elhakmaoui, Ahmed; Acta Crystallographica Section E 67 (2011) o1479–; doi:10.1107/S1600536811018344

data_2230490
_publ_section_title
;
 5,8-Dimethyl-3-methylene-2-oxo-3,3a,4,5,5a,6,8a,8b-octahydro-2<i>H</i>-1-oxa-s-indacene-5-carbaldehyde
;
_journal_coeditor_code           SJ5146
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1479
_journal_paper_doi               10.1107/S1600536811018344
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C15 H18 O3'
_chemical_formula_moiety         'C15 H18 O3'
_chemical_formula_sum            'C15 H18 O3'
_chemical_formula_weight         246.29
_chemical_name_systematic
;
5,8-Dimethyl-3-methylene-2-oxo-3,3a,4,5,5a,6,8a,8b-octahydro-
2<i>H</i>-1-oxa-s-indacene-5-carbaldehyde
;
_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                   9.5293(3)
_cell_length_b                   9.7885(3)
_cell_length_c                   13.7524(4)
_cell_measurement_reflns_used    22932
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.4
_cell_measurement_theta_min      2.6
_cell_volume                     1282.79(7)
_computing_cell_refinement       'APEX2 and SAINT (Bruker, 2005)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_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 APEXII 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  0.0259
_diffrn_reflns_av_sigmaI/netI    0.0115
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            22932
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.60
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.075
_refine_diff_density_max         0.181
_refine_diff_density_min         -0.162
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         1517
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0351
_refine_ls_R_factor_gt           0.0308
_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^)+(0.0511P)^2^+0.1837P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0808
_refine_ls_wR_factor_ref         0.0848
_reflns_number_gt                1403
_reflns_number_total             1517
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sj5146.cif
_cod_data_source_block           I
_cod_database_code               2230490
_cod_database_fobs_code          2230490