Diethyl 1,8-diphenyl-11-oxatricyclo[6.2.1.0^2,7^]undeca-2,4,6-triene-9,10-dicarboxylate
Balakrishnan, B.; Nandakumar, Meganathan; Seshadri, P. R.; Mohanakrishnan, Arasambattu K.; Acta Crystallographica Section E 69 (2013) o323–; doi:10.1107/S1600536813002791

data_2237505
_publ_section_title
;
 Diethyl
 1,8-diphenyl-11-oxatricyclo[6.2.1.0^2,7^]undeca-2,4,6-triene-9,10-dicarboxylate
;
_journal_coeditor_code           IM2416
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o323
_journal_paper_doi               10.1107/S1600536813002791
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C28 H26 O5'
_chemical_formula_moiety         'C28 H26 O5'
_chemical_formula_sum            'C28 H26 O5'
_chemical_formula_weight         442.49
_chemical_name_systematic
;
Diethyl
1,8-diphenyl-11-oxatricyclo[6.2.1.0^2,7^]undeca-2,4,6-triene-9,10-dicarboxylate
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                115.013(2)
_cell_angle_beta                 107.126(2)
_cell_angle_gamma                97.4310(10)
_cell_formula_units_Z            2
_cell_length_a                   9.7126(3)
_cell_length_b                   11.5930(3)
_cell_length_c                   12.5989(5)
_cell_measurement_reflns_used    7905
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.1
_cell_measurement_theta_min      2.3
_cell_volume                     1174.60(7)
_computing_cell_refinement       'APEX2 and SAINT (Bruker, 2004)'
_computing_data_collection       'APEX2 (Bruker, 2004)'
_computing_data_reduction        'SAINT (Bruker, 2004)'
_computing_molecular_graphics
'ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009)'
_computing_publication_material
'PLATON (Spek, 2009) and publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR92 (Altomare <i>et al.</i>, 1993)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       '\w and \f scan'
_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  0.0313
_diffrn_reflns_av_sigmaI/netI    0.0230
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            20057
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.01
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.952
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.251
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             468
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.175
_refine_ls_extinction_coef       0.022(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         4124
_refine_ls_number_restraints     40
_refine_ls_restrained_S_all      1.091
_refine_ls_R_factor_all          0.0540
_refine_ls_R_factor_gt           0.0411
_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^)+(0.0503P)^2^+0.2754P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1000
_refine_ls_wR_factor_ref         0.1100
_reflns_number_gt                3271
_reflns_number_total             4124
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            im2416.cif
_cod_data_source_block           I
_cod_database_code               2237505
_cod_database_fobs_code          2237505