Solid-state photochemistry of cis-cinnamic acids: a competition between [2 + 2] addition and cis–trans isomerization
Veerakanellore, Giri Babu; Captain, Burjor; Ramamurthy, V.; CrystEngComm 18 (2016) 4708–; doi:10.1039/C6CE00682E

data_7225194
_publ_section_title
;
 Solid-state photochemistry of cis-cinnamic acids: a competition between
 [2 + 2] addition and cis--trans isomerization
;
_journal_issue                   25
_journal_name_full               CrystEngComm
_journal_page_first              4708
_journal_paper_doi               10.1039/C6CE00682E
_journal_volume                  18
_journal_year                    2016
_chemical_formula_sum            'C10 H9 Br O3'
_chemical_formula_weight         257.08
_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
_audit_update_record
;
2016-03-10 deposited with the CCDC.
2016-05-11 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 114.5950(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.7172(9)
_cell_length_b                   4.0206(2)
_cell_length_c                   17.5023(10)
_cell_measurement_reflns_used    5184
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.09
_cell_measurement_theta_min      2.28
_cell_volume                     1005.67(10)
_computing_cell_refinement       'SAINT+  V7.46A (Bruker, 2007)'
_computing_data_collection       'APEX2 v2.2-0 (Bruker, 2007)'
_computing_data_reduction        'SAINT+  V7.46A (Bruker, 2007)'
_computing_molecular_graphics    'XSHELL v4.02 (Bruker, 2000)'
_computing_publication_material  'XCIF v6.12 (Bruker, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART APEX2 CCD diffractometer'
_diffrn_measurement_method       'omega 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  0.0464
_diffrn_reflns_av_sigmaI/netI    0.0349
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            14425
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         1.47
_exptl_absorpt_coefficient_mu    4.064
_exptl_absorpt_correction_T_max  0.6867
_exptl_absorpt_correction_T_min  0.2176
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS 2007/4 Bruker)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.698
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.575
_refine_diff_density_min         -0.709
_refine_diff_density_rms         0.086
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2928
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0529
_refine_ls_R_factor_gt           0.0362
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0542P)^2^+0.1504P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.1001
_reflns_number_gt                2226
_reflns_number_total             2928
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6ce00682e2.cif
_cod_data_source_block           collect_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 7225194--7225202.cif.
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7225194