Crystal structures of fluorinated aryl biscarbonates and a biscarbamate: a counterpoise between weak intermolecular interactions and molecular symmetry
Dikundwar, Amol G.; Venkateswarlu, Ch.; Piltz, Ross O.; Chandrasekaran, Srinivasan; Guru Row, Tayur N.; CrystEngComm 13 (2011) 1531–; doi:10.1039/c0ce00537a

data_7205430
_publ_section_title
;
 Crystal structures of fluorinated aryl biscarbonates and a
 biscarbamate: a counterpoise between weak intermolecular interactions
 and molecular symmetry
;
_journal_issue                   5
_journal_name_full               CrystEngComm
_journal_page_first              1531
_journal_paper_doi               10.1039/c0ce00537a
_journal_volume                  13
_journal_year                    2011
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C18 H12 F2 O6'
_chemical_formula_sum            'C18 H12 F2 O6'
_chemical_formula_weight         362.28
_chemical_name_systematic
;
But-2-yne-1,4-diyl bis(4-fluorophenylcarbonate)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 98.500(9)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   14.2326(14)
_cell_length_b                   4.0156(5)
_cell_length_c                   13.8877(12)
_cell_measurement_reflns_used    9118
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      25.99
_cell_measurement_theta_min      2.89
_cell_volume                     785.00(14)
_computing_cell_refinement       'CrysAlisPro CCD (Oxford Diffraction, 2009)'
_computing_data_collection       'CrysAlisPro CCD (Oxford Diffraction, 2009)'
_computing_data_reduction        'CrysAlisPro RED (Oxford Diffraction, 2009)'
_computing_molecular_graphics
'Ortep-3 (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(1)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Xcalibur,Eos(Nova) CCD detector'
_diffrn_measurement_method       'f\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0447
_diffrn_reflns_av_sigmaI/netI    0.0289
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            9118
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.89
_exptl_absorpt_coefficient_mu    0.131
_exptl_absorpt_correction_T_max  0.9744
_exptl_absorpt_correction_T_min  0.9619
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis RED (Oxford Diffraction,2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     142
_refine_ls_number_reflns         1530
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0477
_refine_ls_R_factor_gt           0.0343
_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^)+(0.0513P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0864
_refine_ls_wR_factor_ref         0.0899
_reflns_number_gt                1191
_reflns_number_total             1530
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C0CE00537A.TXT
_cod_data_source_block           veap-f150
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/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 
;
_cod_original_cell_volume        784.99(14)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7205430