'Conformational lock' via unusual intramolecular C-F^...^O[double bond, length as m-dash]C and C-H^...^Cl-C parallel dipoles observed in in situ cryocrystallized liquids
Dhananjay Dey; Subhrajyoti Bhandary; Abhishek Sirohiwal; Venkatesha R. Hathwar; Deepak Chopra; Chem.Commun. 52 (2016) 7225–; doi:

data_7118964
_publ_section_title
;
 'Conformational lock' via unusual intramolecular C-F^...^O[double bond,
 length as m-dash]C and C-H^...^Cl-C parallel dipoles observed in in situ
 cryocrystallized liquids
;
_journal_name_full               Chem.Commun.
_journal_page_first              7225
_journal_volume                  52
_journal_year                    2016
_chemical_formula_sum            'C7 H3 Cl F2 O'
_chemical_formula_weight         176.54
_chemical_melting_point          249.6
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-04-14 deposited with the CCDC.
2016-04-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.5970(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   7.4388(2)
_cell_length_b                   15.7661(3)
_cell_length_c                   11.8282(2)
_cell_measurement_reflns_used    9477
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      30.55
_cell_measurement_theta_min      2.58
_cell_volume                     1384.49(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics
'PLATON (Spek, 2009) and Mercury (Macrae <i>et al.</i>, 2008)'
_computing_publication_material  'WINGX (Farrugia, 2014) and PLATON'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SIR2014 (Burla <i>et al.</i>, 2014)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.828
_diffrn_measured_fraction_theta_max 0.776
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0158
_diffrn_reflns_av_unetI/netI     0.0055
_diffrn_reflns_Laue_measured_fraction_full 0.828
_diffrn_reflns_Laue_measured_fraction_max 0.776
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            44500
_diffrn_reflns_point_group_measured_fraction_full 0.828
_diffrn_reflns_point_group_measured_fraction_max 0.776
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.275
_diffrn_reflns_theta_min         2.155
_exptl_absorpt_coefficient_mu    0.518
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.7236
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.694
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.300
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.048
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         2661
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0275
_refine_ls_R_factor_gt           0.0262
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0294P)^2^+0.9261P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0658
_refine_ls_wR_factor_ref         0.0672
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                2554
_reflns_number_total             2661
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc02535h2.cif
_cod_data_source_block           26dfbc
_cod_database_code               7118964
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.860
_shelx_estimated_absorpt_t_max   0.860
_shelx_res_checksum              97022
_shelx_hkl_checksum              18634