Single-crystal UV-Vis spectroscopic examination of a striking odd-even effect on structure and chromic behaviour of salicylidene alkylamines
Houjou, Hirohiko; Ikedo, Hana; Yoshikawa, Isao; Chem. Commun.  (2017) –; doi:10.1039/C7CC06268K

data_7120657
_publ_section_title
;
 Single-crystal UV-Vis spectroscopic examination of a striking odd-even
 effect on structure and chromic behaviour of salicylidene alkylamines
;
_journal_name_full               'Chem. Commun.'
_journal_paper_doi               10.1039/C7CC06268K
_journal_year                    2017
_chemical_formula_moiety         'C20 H32 Br N O'
_chemical_formula_sum            'C20 H32 Br N O'
_chemical_formula_weight         382.37
_chemical_melting_point          316
_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
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2017-08-03 deposited with the CCDC.
2017-09-14 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 93.957(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.9934(16)
_cell_length_b                   5.7714(8)
_cell_length_c                   35.925(5)
_cell_measurement_reflns_used    2388
_cell_measurement_temperature    253(2)
_cell_measurement_theta_max      22.40
_cell_measurement_theta_min      2.30
_cell_volume                     2067.1(5)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r3'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r3 (Rigaku, 2009)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r3'
_computing_molecular_graphics    'CrystalStructure 4.1.1'
_computing_publication_material  'CrystalStructure 4.1.1 (Rigaku, 2015)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      253(2)
_diffrn_detector_area_resol_mean 7.111
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'VariMax DW with Saturn'
_diffrn_measurement_method       \w
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0532
_diffrn_reflns_av_unetI/netI     0.0426
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            10536
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        22.429
_diffrn_reflns_theta_max         22.429
_diffrn_reflns_theta_min         2.950
_exptl_absorpt_coefficient_mu    1.994
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.516
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.229
_exptl_crystal_description       needle
_exptl_crystal_F_000             808
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: methanol'
_exptl_crystal_size_max          0.520
_exptl_crystal_size_mid          0.030
_exptl_crystal_size_min          0.010
_refine_diff_density_max         0.438
_refine_diff_density_min         -0.374
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         2676
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0571
_refine_ls_R_factor_gt           0.0440
_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^)+(0.0556P)^2^+0.0651P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1025
_refine_ls_wR_factor_ref         0.1096
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2146
_reflns_number_total             2676
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7cc06268k2.cif
_cod_data_source_block           shelxl_CCDC2
_cod_database_code               7120657
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.424
_shelx_estimated_absorpt_t_max   0.980
_shelx_res_checksum              30379