Reversible Thermal Gating of the Photochromic Properties of 3-Methyl-2-(2‘,4‘-dinitrobenzyl)pyridine in a Single Crystal
Naumov, Panče; Sakurai, Kenji; Crystal Growth & Design 5 (2005) 1699–; doi:10.1021/cg050328+

data_4511566
_publ_section_title
;
 Reversible Thermal Gating of the Photochromic Properties of
 3-Methyl-2-(2&#x2018;,4&#x2018;-dinitrobenzyl)pyridine in a Single
 Crystal
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1699
_journal_paper_doi               10.1021/cg050328+
_journal_volume                  5
_journal_year                    2005
_chemical_formula_sum            'C12 H11 N3 O4'
_chemical_formula_weight         261.24
_chemical_name_systematic
;
 3-methyl-2-(2',4'-dinitrobenzyl)pyridine
;
_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                 106.188(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.3860(7)
_cell_length_b                   15.4220(10)
_cell_length_c                   7.6580(5)
_cell_measurement_temperature    319.7(2)
_cell_volume                     1291.39(14)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        'SAINT (Siemens, 1996)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      320(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Siemens SMART CCD'
_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  0.0487
_diffrn_reflns_av_sigmaI/netI    0.0532
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            9100
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.344
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.202
_refine_diff_density_max         0.205
_refine_diff_density_min         -0.234
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       0.037(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.915
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         2959
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.915
_refine_ls_R_factor_all          0.0841
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0760P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1211
_refine_ls_wR_factor_ref         0.1359
_reflns_number_gt                1652
_reflns_number_total             2959
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg050328%2Bsi20050712_102038.cif
_cod_data_source_block           point2
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4511566