4-Bromo-trans-cinnamic acid: structural characterisation and crystallographic investigation into the solid state [2 + 2] cycloaddition reaction and temperature induced phase transition
Yates, Jane L. R.; Sparkes, Hazel A.; CrystEngComm 15 (2013) 3547–; doi:10.1039/c3ce40300a

data_7209814
_publ_section_title
;
 4-Bromo-trans-cinnamic acid: structural characterisation and
 crystallographic investigation into the solid state [2 + 2] cycloaddition
 reaction and temperature induced phase transition
;
_journal_issue                   18
_journal_name_full               CrystEngComm
_journal_page_first              3547
_journal_paper_doi               10.1039/c3ce40300a
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C9 H7 Br O2'
_chemical_formula_sum            'C9 H7 Br O2'
_chemical_formula_weight         227.06
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.5710(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.8994(4)
_cell_length_b                   3.8566(2)
_cell_length_c                   31.2021(19)
_cell_measurement_reflns_used    3210
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      56.560
_cell_measurement_theta_min      5.222
_cell_volume                     830.19(8)
_computing_cell_refinement       'SAINT version 6.45A (Bruker, 2003)'
_computing_data_collection       'SMART version 5.054 (Bruker, 1999)'
_computing_data_reduction        'SAINT version 6.45A (Bruker, 2003)'
_computing_molecular_graphics    'ORTEP3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART 6K CCD Detector'
_diffrn_measurement_method       \w
_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  0.0377
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            4802
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.35
_diffrn_reflns_theta_min         1.31
_exptl_absorpt_coefficient_mu    4.901
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.641
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (G. Sheldrick, 1998)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.817
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.095
_refine_diff_density_min         -0.818
_refine_diff_density_rms         0.128
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.106
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1689
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.106
_refine_ls_R_factor_all          0.0379
_refine_ls_R_factor_gt           0.0345
_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^)+(0.0449P)^2^+1.0312P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0900
_refine_ls_wR_factor_ref         0.0921
_reflns_number_gt                1538
_reflns_number_total             1689
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce40300a.txt
_cod_data_source_block           120K
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7209814