10-Methyl-9,11-annulated dibenzobarrelene
Devassia, Tomson; Mathew, Eason M.; Sithambaresan, M.; Unnikrishnan, P. A.; Kurup, M. R. Prathapachandra; IUCrData 3 (2018) x181102–; doi:10.1107/S2414314618011021

data_1549781
_publ_section_title
;
 10-Methyl-9,11-annulated dibenzobarrelene
;
_journal_coeditor_code           LH4037
_journal_issue                   8
_journal_name_full               IUCrData
_journal_page_first              x181102
_journal_paper_doi               10.1107/S2414314618011021
_journal_volume                  3
_journal_year                    2018
_chemical_formula_iupac          'C19 H14 O2'
_chemical_formula_moiety         'C19 H14 O2'
_chemical_formula_sum            'C19 H14 O2'
_chemical_formula_weight         274.30
_chemical_name_systematic
8-Methyl-16-oxapentacyclo[6.6.5.0^1,18^.0^2,7^.0^9,14^]nonadeca-2,4,6,9(14),10,12,18-heptaen-15-one
_space_group_crystal_system      orthorhombic
_space_group_IT_number           60
_space_group_name_Hall           '-P 2n 2ab'
_space_group_name_H-M_alt        'P b c n'
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   19.7403(10)
_cell_length_b                   9.3294(3)
_cell_length_c                   15.0595(7)
_cell_measurement_reflns_used    8066
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      56.296
_cell_measurement_theta_min      4.829
_cell_volume                     2773.4(2)
_computing_cell_refinement
;
APEX2 and SAINT (Bruker, 2004)
;
_computing_data_collection
;
APEX2 (Bruker, 2004)
;
_computing_data_reduction
;
SAINT and XPREP (Bruker, 2004)
;
_computing_molecular_graphics
;
ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg,
2010)
;
_computing_publication_material
;
SHELXL2018 (Sheldrick, 2015b) and publCIF (Westrip, 2010)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015b)
;
_computing_structure_solution
;
SHELXT (Sheldrick, 2015a)
;
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       '\w and \f scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0302
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            21513
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.328
_diffrn_reflns_theta_min         2.415
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9833
_exptl_absorpt_correction_T_min  0.9671
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(SADABS; Bruker, 2004)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.314
_exptl_crystal_description       block
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.222
_refine_diff_density_min         -0.250
_refine_ls_extinction_coef       0.0118(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method
;
SHELXL2018 (Sheldrick, 2015b)
;
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3394
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0656
_refine_ls_R_factor_gt           0.0457
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0680P)^2^+0.5261P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1168
_refine_ls_wR_factor_ref         0.1318
_reflns_number_gt                2487
_reflns_number_total             3394
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            lh4037sup1.cif
_cod_data_source_block           I
_cod_database_code               1549781
_cod_database_fobs_code          1549781
_shelx_estimated_absorpt_t_min   0.967
_shelx_estimated_absorpt_t_max   0.983
_shelx_hkl_checksum              80003
_shelx_res_checksum              12152