Arene-perfluoroarene interactions in crystal engineering: structural preferences in polyfluorinated tolans
Smith, Caroline E.; Smith, Philip S.; Thomas, Rhodri Ll.; Robins, Edward G.; Collings, Jonathan C.; Dai, Chaoyang; Scott, Andrew J.; Borwick, Simon; Batsanov, Andrei S.; Watt, Stephen W.; Clark, Stewart J.; Viney, Christopher; Howard, Judith A. K.; Clegg, William; Marder, Todd B.; Journal of Materials Chemistry 14 (2004) 413–420; doi:10.1039/b314094f

data_7204773
_publ_section_title
;
 Arene-perfluoroarene interactions in crystal engineering: structural
 preferences in polyfluorinated tolans
;
_journal_coden_ASTM              JMACEP
_journal_issue                   3
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              413
_journal_page_last               420
_journal_paper_doi               10.1039/b314094f
_journal_volume                  14
_journal_year                    2004
_chemical_formula_moiety         'C17 H12 F4 O'
_chemical_formula_sum            'C17 H12 F4 O'
_chemical_formula_weight         308.27
_chemical_melting_point          337.6(3)
_chemical_name_systematic
;
1-(4-iso-propoxytetrafluorophenyl)-2-phenylacetylene
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.35(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.1278(15)
_cell_length_b                   15.444(4)
_cell_length_c                   15.382(3)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.2
_cell_measurement_theta_min      22.3
_cell_volume                     1443.8(6)
_computing_cell_refinement       MSC/AFC
_computing_data_collection       MSC/AFC
_computing_data_reduction        TEXSAN
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.953
_diffrn_measured_fraction_theta_max 0.953
_diffrn_measurement_device       'Rigaku AFC6S 4-circle diffractometer'
_diffrn_measurement_method       '2\q/\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  0.0137
_diffrn_reflns_av_sigmaI/netI    0.0270
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            3919
_diffrn_reflns_theta_full        75.07
_diffrn_reflns_theta_max         75.07
_diffrn_reflns_theta_min         4.07
_diffrn_standards_decay_%        0.8
_diffrn_standards_interval_count 147
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    1.062
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8899
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'T_max,min from 108 \y-scans of 3 reflections'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.418
_exptl_crystal_description       Prism
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.410
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     247
_refine_ls_number_reflns         2840
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0503
_refine_ls_R_factor_gt           0.0415
_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^)+(0.0755P)^2^+0.3384P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1219
_refine_ls_wR_factor_ref         0.1303
_reflns_number_gt                2399
_reflns_number_total             2840
_reflns_observed_criterion       I>2\s(I)
_cod_data_source_file            b314094f.txt
_cod_data_source_block           4d
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/adriana/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1555 2011-01-17 13:19:09Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '64.2--64.7\% C' was changed to
'337.6(3)' - it was converted from degrees Celsius(C) to Kelvins(K),
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1569 2011-02-09 13:29:24Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7204773