H/F isosteric substitution to attest different equi-energetic molecular conformations in crystals
Dikundwar, Amol G.; Venkateswarlu, Ch.; Chandrakala, R. N.; Chandrasekaran, Srinivasan; Row, Tayur N. Guru; CrystEngComm 15 (2013) 5403–; doi:10.1039/c3ce40697k

data_7210011
_publ_section_title
;
 H/F isosteric substitution to attest different equi-energetic molecular
 conformations in crystals
;
_journal_issue                   27
_journal_name_full               CrystEngComm
_journal_page_first              5403
_journal_paper_doi               10.1039/c3ce40697k
_journal_volume                  15
_journal_year                    2013
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C20 H12 F2 O6'
_chemical_formula_sum            'C20 H12 F2 O6'
_chemical_formula_weight         386.30
_chemical_name_systematic
;
hexa-2,4-diyne-1,6-diyl bis(3-fluorophenylcarbonate)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 110.433(7)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.8305(12)
_cell_length_b                   3.9051(3)
_cell_length_c                   22.4954(12)
_cell_measurement_reflns_used    18137
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.7
_cell_volume                     1714.8(2)
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0427
_diffrn_reflns_av_sigmaI/netI    0.0270
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            18137
_diffrn_reflns_reduction_process
;

;
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.72
_exptl_absorpt_coefficient_mu    0.125
_exptl_absorpt_correction_T_max  0.9876
_exptl_absorpt_correction_T_min  0.9517
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis RED (Oxford Diffraction,2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.496
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.167
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         3031
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0448
_refine_ls_R_factor_gt           0.0364
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0538P)^2^+0.3818P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0970
_refine_ls_wR_factor_ref         0.1032
_reflns_number_gt                2552
_reflns_number_total             3031
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce40697k.txt
_cod_data_source_block           avebmfp_150
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7210011