Pyridine-substituted nitronyl nitroxide biradicals: a triplet (S = 1) ground state lasting out N-methylation
Hayakawa, Kenichi; Shiomi, Daisuke; Ise, Tomoaki; Sato, Kazunobu; Takui, Takeji; Journal of Materials Chemistry 16 (2006) 4146–; doi:10.1039/b609760j

data_7203581
_publ_section_title
;
 Pyridine-substituted nitronyl nitroxide biradicals: a triplet (S = 1)
 ground state lasting out N-methylation
;
_journal_issue                   42
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              4146
_journal_paper_doi               10.1039/b609760j
_journal_volume                  16
_journal_year                    2006
_chemical_formula_moiety         'C38 H54 N10 O8 '
_chemical_formula_sum            'C19 H27 N5 O4'
_chemical_formula_weight         389.45
_chemical_name_common
;3,5-bis(1-oxyl-3-oxide-4,4,5,5-tetramethyl-2-imidazolin-2-
yl)pyridine
;
_chemical_name_systematic
;
3,5-bis(1-oxyl-3-oxide-4,4,5,5-tetramethyl-2-imidazolin-2-yl)pyridine
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_audit_creation_method           'by CrystalStructure 3.7.0'
_cell_angle_alpha                108.566(3)
_cell_angle_beta                 110.869(3)
_cell_angle_gamma                89.344(3)
_cell_formula_units_Z            4
_cell_length_a                   11.275(4)
_cell_length_b                   11.242(4)
_cell_length_c                   17.688(6)
_cell_measurement_reflns_used    6300
_cell_measurement_temperature    143.1
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      4.1
_cell_volume                     1972.7(12)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalStructure
_computing_publication_material  'CrystalStructure 3.7.0'
_computing_structure_refinement  CRYSTALS
_computing_structure_solution    SIR92
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.943
_diffrn_measured_fraction_theta_max 0.943
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.020
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            16043
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.884
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.311
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             832.00
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.39
_refine_diff_density_min         -0.44
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.144
_refine_ls_hydrogen_treatment    refall
_refine_ls_number_parameters     559
_refine_ls_number_reflns         7810
_refine_ls_R_factor_gt           0.0665
_refine_ls_shift/su_max          0.0000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
Chebychev polynomial with 3 parameters (Carruthers & Watkin, 1979)
4495.8000 6233.0600 1901.2500
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0852
_reflns_number_gt                7810
_reflns_number_total             8545
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            b609760j.txt
_cod_data_source_block           compound_1
_cod_original_cell_volume        1972.9(12)
_cod_original_formula_sum        'C38 H54 N10 O8 '
_cod_database_code               7203581