Weak hydrogen bonding between acetylenic groups: the formation of diamondoid nets in the crystal structure of tetrakis(4-ethynylphenyl)methane†
Galoppini, Elena; Gilardi, Richard; Chemical Communications  (1999) 173–; doi:10.1039/a807993e

data_7110390
_publ_contact_author
;
      Richard Gilardi
      Laboratory for the Structure of Matter
      The Naval Research Laboratory, Code 6030
      Washington, D. C. ; USA 20375-5341
;
_publ_section_title
;
 Weak hydrogen bonding between acetylenic groups: the formation of
 diamondoid nets in the crystal structure of
 tetrakis(4-ethynylphenyl)methane&#x2020;
;
_journal_issue                   2
_journal_name_full               'Chemical Communications'
_journal_page_first              173
_journal_paper_doi               10.1039/a807993e
_journal_year                    1999
_chemical_compound_source        synthesis
_chemical_formula_sum            'C33 H20'
_chemical_formula_weight         416.49
_chemical_name_systematic
;
 tetrakis(4-Ethynylphenyl)methane
;
_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   difmap
_atom_sites_solution_primary     direct
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.9197(4)
_cell_length_b                   12.9197(4)
_cell_length_c                   7.2357(5)
_cell_measurement_reflns_used    59
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      39.53
_cell_measurement_theta_min      4.83
_cell_volume                     1207.77(10)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0352
_diffrn_reflns_av_sigmaI/netI    0.0363
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       2
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       0
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            1204
_diffrn_reflns_theta_max         58.00
_diffrn_reflns_theta_min         4.84
_diffrn_standards_decay_%        0.0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.493
_exptl_absorpt_correction_T_max  0.9196
_exptl_absorpt_correction_T_min  0.8540
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            'clear colorless'
_exptl_crystal_density_diffrn    1.145
_exptl_crystal_description       'stout prism'
_exptl_crystal_F_000             436
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.081
_refine_diff_density_min         -0.081
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -3.88(364)
_refine_ls_extinction_coef       0.0112(14)
_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_all   1.054
_refine_ls_goodness_of_fit_obs   1.065
_refine_ls_hydrogen_treatment    'xyz's and Uiso's refined'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     88
_refine_ls_number_reflns         846
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_restrained_S_obs      1.065
_refine_ls_R_factor_all          0.0367
_refine_ls_R_factor_obs          0.0354
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0650P)^2^+0.1075P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0993
_refine_ls_wR_factor_obs         0.0951
_reflns_number_observed          814
_reflns_number_total             848
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            807993esup1.cif
_cod_data_source_block           galop01
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0650P)^2^+0.1075P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0650P)^2^+0.1075P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      I-4
_cod_database_code               7110390