Using Spiropyran Fragment Superposition To Assign the EPR Spectrum of Localized Triplet Excitation on a Distorted Aromatic Nitro Group†
Vary, Michael W.; McBride, J. Michael; Crystal Growth & Design 5 (2005) 2036–; doi:10.1021/cg0503907

data_4505251
_publ_section_title
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 Using Spiropyran Fragment Superposition To Assign the EPR Spectrum of
 Localized Triplet Excitation on a Distorted Aromatic Nitro Group&#x2020;
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_journal_issue                   6
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2036
_journal_paper_doi               10.1021/cg0503907
_journal_volume                  5
_journal_year                    2005
_chemical_formula_iupac          'C26 H24 N2 O4'
_chemical_formula_moiety         'C26 H24 N2 O4'
_chemical_formula_sum            'C26 H24 N2 O4'
_chemical_formula_weight         428.49
_chemical_melting_point          427.5(15)
_chemical_name_common            'ethoxynitrospiropyran 1b'
_chemical_name_systematic
' 3',3'-dimethyl-6-Ethoxy-8-nitro-1'-phenylspiro[2H-1-benzopyran-2,2'-indoline'
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_cell_angle_alpha                90
_cell_angle_beta                 105.36(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.260(3)
_cell_length_b                   17.210(5)
_cell_length_c                   8.341(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296
_cell_measurement_theta_max      11.3
_cell_measurement_theta_min      3.3
_cell_volume                     1143.4(8)
_computing_cell_refinement       TEXSAN
_computing_data_collection       TEXSAN
_computing_data_reduction        TEXSAN
_computing_structure_refinement  TEXSAN
_computing_structure_solution    'MULTAN / FASTAN'
_diffrn_ambient_temperature      296
_diffrn_measurement_device       CAD4
_diffrn_measurement_method       'omega - 2 theta'
_diffrn_radiation_detector       'scintillation counter'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_number            1759
_diffrn_reflns_reduction_process 'L/p not decay/absorption'
_diffrn_reflns_theta_max         27
_diffrn_reflns_theta_min         1.5
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_density_meas      ?
_exptl_crystal_description       prism
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.35
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_R_factor_gt           0.046
_refine_ls_shift/su_max          0.62
_refine_ls_structure_factor_coef Fsqd
_refine_ls_wR_factor_ref         0.060
_reflns_number_gt                '1539 gt 3s'
_reflns_number_total             1759
_cod_data_source_file            cg0503907si20051007_103241.cif
_cod_data_source_block           I
_cod_depositor_comments
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The following automatic conversions were performed:

'_chemical_melting_point' value '426-429' was changed to '427.5(15)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1143.4
_cod_original_sg_symbol_H-M      'P 21     '
_cod_database_code               4505251