Weak Interactions in the Crystal Structures of Tetraacetylenes Derived from Pentaerythrityl Tetraphenyl Ether
Dominic Laliberté; Thierry Maris; Patrick Eddy Ryan; James D. Wuest; Cryst. Growth & Design 6 (2006) 1335–1340; doi:10.1021/cg050568p

data_4500064
_publ_section_title
;
 Weak Interactions in the Crystal Structures of Tetraacetylenes Derived
 from Pentaerythrityl Tetraphenyl Ether
;
_journal_name_full               'Cryst. Growth & Design'
_journal_page_first              1335
_journal_page_last               1340
_journal_paper_doi               10.1021/cg050568p
_journal_volume                  6
_journal_year                    2006
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C37 H28 O4'
_chemical_formula_sum            'C37 H28 O4'
_chemical_formula_weight         536.59
_space_group_IT_number           82
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_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            2
_cell_length_a                   13.1200(19)
_cell_length_b                   13.1200(19)
_cell_length_c                   8.8810(18)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      15.00
_cell_volume                     1528.7(4)
_computing_cell_refinement       'CAD4 Program (Nonius 1989)'
_computing_data_collection       'CAD4 Program (Nonius 1989)'
_computing_data_reduction        'Local Program'
_computing_molecular_graphics    'SHELXTL (Bruker, 1997)'
_computing_publication_material  'UdMX (local program)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  Enraf-Nonius-CAD4
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Sealed Tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.087
_diffrn_reflns_av_sigmaI/netI    0.0849
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            11486
_diffrn_reflns_theta_full        69.97
_diffrn_reflns_theta_max         69.97
_diffrn_reflns_theta_min         4.77
_diffrn_standards_decay_%        0.32
_diffrn_standards_interval_time  60
_diffrn_standards_number         5
_exptl_absorpt_coefficient_mu    0.597
_exptl_absorpt_correction_T_max  0.8400
_exptl_absorpt_correction_T_min  0.8200
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   'No absorption correction applied'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.166
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             564
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.102
_refine_diff_density_min         -0.085
_refine_diff_density_rms         0.025
_refine_ls_abs_structure_details 'Flack H D (1983), 672 Friedel Pairs'
_refine_ls_abs_structure_Flack   0.5(2)
_refine_ls_extinction_coef       0.0044(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     98
_refine_ls_number_reflns         1447
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0398
_refine_ls_R_factor_gt           0.0360
_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^)+(0.0230P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0856
_refine_ls_wR_factor_ref         0.0873
_reflns_number_gt                1242
_reflns_number_total             1447
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            deposit.cif
_cod_data_source_block           jiw559
_cod_original_sg_symbol_H-M      I-4
_cod_database_code               4500064