Photochromism of (E)-4-phenyl-1-(pyridine-2-ylmethylene)semicarbazide
Lin, Lirong; Fan, Weizhen; Chen, Shui; Ma, Jie; Hu, Wangxia; Lin, Yiji; Zhang, Hui; Huang, Rongbin; New Journal of Chemistry 36 (2012) 2562–; doi:10.1039/c2nj40468k

data_7052950
_publ_section_title
;
 Photochromism of (E)-4-phenyl-1-(pyridine-2-ylmethylene)semicarbazide
;
_journal_issue                   12
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2562
_journal_paper_doi               10.1039/c2nj40468k
_journal_volume                  36
_journal_year                    2012
_chemical_formula_moiety         'C13 H12 N4 O'
_chemical_formula_sum            'C13 H12 N4 O'
_chemical_formula_weight         240.27
_chemical_name_common
Z-4-phenyl-1-(pyridine-2-ylmethylene)semicarbazide
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.720(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   22.602(8)
_cell_length_b                   5.5689(19)
_cell_length_c                   20.209(7)
_cell_measurement_reflns_used    4676
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      26.0
_cell_measurement_theta_min      1.9
_cell_volume                     2394.5(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SHELXTL V.5.0 (Sheldrick, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker Smart Apex CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0391
_diffrn_reflns_av_sigmaI/netI    0.0491
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12309
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.91
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9823
_exptl_absorpt_correction_T_min  0.9566
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         4676
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0999
_refine_ls_R_factor_gt           0.0711
_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^)+(0.0609P)^2^+0.7390P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1566
_refine_ls_wR_factor_ref         0.1723
_reflns_number_gt                3375
_reflns_number_total             4676
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2nj40468k.txt
_cod_data_source_block           p
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_Hall     -P_2ybc
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7052950