Variability in Halogen Interactions: In situ Cryocrystallization of Low Melting Substituted Trifluoroacetophenones
Chopra, Deepak; Thiruvenkatam, Vijay; Manjunath, S. G.; Guru Row, Tayur N.; Crystal Growth & Design 7 (2007) 868–; doi:10.1021/cg0604881

data_4503928
_publ_section_title
;
 Variability in Halogen Interactions:&#x00A0; In situ Cryocrystallization
 of Low Melting Substituted Trifluoroacetophenones
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              868
_journal_paper_doi               10.1021/cg0604881
_journal_volume                  7
_journal_year                    2007
_chemical_formula_moiety         'C8 H4 Br F3 O'
_chemical_formula_sum            'C8 H4 Br F3 O'
_chemical_formula_weight         253.01
_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                 90.456(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   4.5037(17)
_cell_length_b                   14.915(6)
_cell_length_c                   12.927(5)
_cell_measurement_reflns_used    825
_cell_measurement_temperature    175(2)
_cell_measurement_theta_max      25.8
_cell_measurement_theta_min      1.8
_cell_volume                     868.3(6)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT (Bruker, 1998)'
_computing_molecular_graphics
'Ortep-3 for Windows (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1993)'
_diffrn_ambient_temperature      175(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'Bruker SMART CCD area detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0332
_diffrn_reflns_av_sigmaI/netI    0.0326
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7214
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.17
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    4.736
_exptl_absorpt_correction_T_max  0.388
_exptl_absorpt_correction_T_min  0.254
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1997)'
_exptl_crystal_colour            ' colorless'
_exptl_crystal_density_diffrn    1.936
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       ' blocks'
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.473
_refine_diff_density_min         -0.591
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     134
_refine_ls_number_reflns         2026
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0490
_refine_ls_R_factor_gt           0.0320
_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^)+(0.0545P)^2^+0.0458P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0821
_refine_ls_wR_factor_ref         0.0891
_reflns_number_gt                1546
_reflns_number_total             2026
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg0604881si20070308_121227.cif
_cod_data_source_block           3brftrim
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4503928