The impact of solid solution composition on kinetics and mechanism of [2 + 2] photodimerization of cinnamic acid derivatives
Pandolfi, Lorenzo; Giunchi, Andrea; Salzillo, Tommaso; Brillante, Aldo; Della Valle, Raffaele G.; Venuti, Elisabetta; Grepioni, Fabrizia; D'Agostino, Simone; CrystEngComm 23 (2021) 1352–1359; doi:10.1039/D0CE01718C

data_7241980
_publ_section_title
;
 The impact of solid solution composition on kinetics and mechanism of [2
 + 2] photodimerization of cinnamic acid derivatives
;
_journal_issue                   6
_journal_name_full               CrystEngComm
_journal_page_first              1352
_journal_page_last               1359
_journal_paper_doi               10.1039/D0CE01718C
_journal_volume                  23
_journal_year                    2021
_chemical_formula_moiety         'Br0.25 Cl0.75, C9 H10 N O2'
_chemical_formula_sum            'C9 H11 Br0.25 Cl0.75 N O2'
_chemical_formula_weight         211.75
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2020-06-10
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-10-16 deposited with the CCDC.	2020-12-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.673(13)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.8421(7)
_cell_length_b                   8.2764(14)
_cell_length_c                   18.838(3)
_cell_measurement_reflns_used    951
_cell_measurement_temperature    300
_cell_measurement_theta_max      26.7830
_cell_measurement_theta_min      3.9900
_cell_volume                     909.9(2)
_computing_cell_refinement       'CrysAlisPro 1.171.40.69a (Rigaku OD, 2020)'
_computing_data_collection       'CrysAlisPro 1.171.40.69a (Rigaku OD, 2020)'
_computing_data_reduction        'CrysAlisPro 1.171.40.69a (Rigaku OD, 2020)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      300
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.1340
_diffrn_detector_type            Sapphire3
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.865
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w    -48.00  -3.00   1.00   58.07    --  -16.44 -30.00-174.00   45
  2  \w    -38.00  12.00   1.00   58.07    --  -16.44 -77.00-120.00   50
  3  \w    -32.00   9.00   1.00   58.07    --  -16.44 -77.00  30.00   41
  4  \w    -54.00  24.00   1.00   58.07    --   17.92 -19.00  90.00   78
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0561830000
_diffrn_orient_matrix_UB_12      -0.0757462000
_diffrn_orient_matrix_UB_13      -0.0030523000
_diffrn_orient_matrix_UB_21      -0.1006637000
_diffrn_orient_matrix_UB_22      0.0389162000
_diffrn_orient_matrix_UB_23      -0.0138553000
_diffrn_orient_matrix_UB_31      0.0388063000
_diffrn_orient_matrix_UB_32      -0.0087726000
_diffrn_orient_matrix_UB_33      -0.0349328000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0403
_diffrn_reflns_av_unetI/netI     0.0762
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.865
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            3786
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.865
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         28.859
_diffrn_reflns_theta_min         3.278
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    1.408
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.48333
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.40.69a (Rigaku Oxford Diffraction, 2020)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.546
_exptl_crystal_description       block
_exptl_crystal_F_000             438
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.684
_refine_diff_density_min         -0.676
_refine_diff_density_rms         0.119
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2061
_refine_ls_number_restraints     81
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.1398
_refine_ls_R_factor_gt           0.0898
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1230P)^2^+0.1017P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2217
_refine_ls_wR_factor_ref         0.2608
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1177
_reflns_number_total             2061
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01718c2.cif
_cod_data_source_block           '[12H2]Br05Cl15'
_cod_depositor_comments
'Adding full bibliography for 7241976--7241984.cif.'
_cod_database_code               7241980
_shelx_shelxl_version_number     2016/6
_reflns_odcompleteness_completeness 98.85
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H,H,H) groups
 At 1.5 times of:
  All O(H) groups
2. Rigid body (RIGU) restrains
 O1, C9, C8, O2, C7, H8, C4, H7, C5, C3, H5, C6, C2, H3, C1, H6, H2, N1, H1A,
 H1B, H1C
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
3. Others
 Fixed Sof: Br1(0.25) Cl1(0.75)
4.a Ternary CH refined with riding coordinates:
 C7(H7), C8(H8)
4.b Aromatic/amide H refined with riding coordinates:
 C5(H5), C6(H6), C2(H2), C3(H3)
4.c Idealised Me refined as rotating group:
 N1(H1A,H1B,H1C)
4.d Idealised tetrahedral OH refined as rotating group:
 O2(H2A)
;
_shelx_res_checksum              41279
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.586
_oxdiff_exptl_absorpt_empirical_full_min 0.627