TEMPO radicals showing magnetic interactions. II. 4-(Benzylideneamino)-TEMPO and related compounds
Iwasaki, Fujiko; Yoshikawa, Joseph H.; Yamamoto, Hajime; Takada, Kiwamu; Kan-nari, Eiji; Yasui, Masanori; Ishida, Takayuki; Nogami, Takashi; Acta Crystallographica Section B 55 (1999) 1057–1067; doi:10.1107/S0108768199007326

data_2105631
_publ_section_title
;
 TEMPO radicals showing magnetic interactions. II.
 4-(Benzylideneamino)-TEMPO and related compounds
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              1057
_journal_page_last               1067
_journal_paper_doi               10.1107/S0108768199007326
_journal_volume                  55
_journal_year                    1999
_chemical_formula_moiety         'C20 H25 N2 O '
_chemical_formula_sum            'C20 H25 N2 O'
_chemical_formula_weight         309.43
_chemical_melting_point          ?
_chemical_name_common            Naph-TEMPO
_chemical_name_systematic
4-(2-naphthylmethyleneamino)-2,2,6,6-tetramethylpiperidin-1-oxyl
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                   20.0837(19)
_cell_length_b                   5.6969(7)
_cell_length_c                   15.106(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    295
_cell_measurement_theta_max      17.2
_cell_measurement_theta_min      13.6
_cell_volume                     1728.4(4)
_computing_cell_refinement       'AFC (Rigaku Co., 1990)'
_computing_data_collection       'AFC (Rigaku Co., 1990)'
_computing_data_reduction        'teXsan (MSC, 1992)'
_computing_molecular_graphics    'ORTEP II (Johnson, 1976)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SAPI91 (Fan, 1991)'
_diffrn_ambient_temperature      295
_diffrn_measurement_device       'Rigaku AFC5R'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rigaku rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .0000
_diffrn_reflns_av_sigmaI/netI    .0375
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2059
_diffrn_reflns_reduction_process 'Lp corrections applied'
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.70
_diffrn_standards_decay_%        .22
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    .073
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.189
_exptl_crystal_density_meas      ?
_exptl_crystal_description       prism
_exptl_crystal_F_000             668.00
_exptl_crystal_size_max          .50
_exptl_crystal_size_mid          .38
_exptl_crystal_size_min          .10
_refine_diff_density_max         .164
_refine_diff_density_min         -.134
_refine_ls_extinction_coef       .017(2)
_refine_ls_extinction_method     'SHELXL-97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     260
_refine_ls_number_reflns         2059
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          .0772
_refine_ls_R_factor_gt           .0433
_refine_ls_shift/su_max          .004
_refine_ls_shift/su_mean         .001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0544P)^2^+0.0293P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .1101
_reflns_number_gt                1491
_reflns_number_total             2059
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            oa0021.cif
_cod_data_source_block           12
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

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 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0544P)^2^+0.0293P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0544P)^2^+0.0293P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P n a 21     '
_cod_original_formula_sum        'C20 H25 N2 O '
_cod_database_code               2105631