Unusual para-substituent effects on the intramolecular hydrogen-bond in hydrazone-based switches
Xin Su; Mart Lokov; Agnes Kutt; Ivo Leito; Ivan Aprahamian; Chem.Commun. 48 (2012) 10490–; doi:10.1039/c2cc35860c

data_7108490
_publ_section_title
;
 Unusual para-substituent effects on the intramolecular hydrogen-bond in
 hydrazone-based switches
;
_journal_name_full               Chem.Commun.
_journal_page_first              10490
_journal_paper_doi               10.1039/c2cc35860c
_journal_volume                  48
_journal_year                    2012
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C15 H14 Br N3 O2'
_chemical_formula_sum            'C15 H14 Br N3 O2'
_chemical_formula_weight         348.20
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2194(2)
_cell_length_b                   10.0881(3)
_cell_length_c                   20.1172(6)
_cell_measurement_reflns_used    4878
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.32
_cell_measurement_theta_min      2.26
_cell_volume                     1465.14(7)
_computing_cell_refinement       'APEX2 (BRUKER, V2010.11-3, 2010)'
_computing_data_collection       'COSMO (BRUKER, V1.61, 2009)'
_computing_data_reduction        'SAINT (BRUKER, V7.68A, 2010)'
_computing_molecular_graphics
'SHELXTL (Sheldrick, Acta Cryst. A64 2008, 112-122)'
_computing_publication_material
'SHELXTL (Sheldrick, Acta Cryst. A64 2008, 112-122)'
_computing_structure_refinement
'SHELXL (Sheldrick, Acta Cryst. A64 2008, 112-122)'
_computing_structure_solution
'SHELXS (Sheldrick, Acta Cryst. A64 2008, 112-122)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 836.6
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w,and/f 0.5 deg'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0269
_diffrn_reflns_av_sigmaI/netI    0.0419
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            7614
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         2.02
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    2.813
_exptl_absorpt_correction_T_max  0.7623
_exptl_absorpt_correction_T_min  0.4948
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.579
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.000(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         2644
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0310
_refine_ls_R_factor_gt           0.0247
_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^)+(0.0187P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0538
_refine_ls_wR_factor_ref         0.0556
_reflns_number_gt                2332
_reflns_number_total             2644
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc35860c.txt
_cod_data_source_block           ia2511_0m
_cod_original_sg_symbol_Hall     'P 2ac 2ab '
_cod_database_code               7108490
_contact_crystallographer_name   'Richard Staples'
_contact_crystallographer_email  staples@chemistry.msu.com