Preparation and Spectroscopic, Magnetic, and Electrochemical Studies of Mono-/Biradical TEMPO Derivatives
Miroslav Kavala; Roman Boča; Lubomír Dlháň; Vlasta Brezová; Martin Breza; Jozef Kožíšek; Marek Fronc; Peter Herich; Lubomír Švorc; Peter Szolcsányi; Journal of Organic Chemistry 78 (2013) 6558–6569; doi:10.1021/jo400845m

data_4028403
_publ_section_title
;
 Preparation and Spectroscopic, Magnetic, and Electrochemical Studies of
 Mono-/Biradical TEMPO Derivatives
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6558
_journal_page_last               6569
_journal_paper_doi               10.1021/jo400845m
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C20 H39 N3 O4'
_chemical_formula_weight         385.29
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           118
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 -2n'
_symmetry_space_group_name_H-M   'P -4 n 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   11.84310(10)
_cell_length_b                   11.84310(10)
_cell_length_c                   19.1284(4)
_cell_measurement_reflns_used    19108
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      72.8300
_cell_measurement_theta_min      2.3470
_cell_volume                     2682.93(6)
_computing_molecular_graphics    'DIAMOND (Brandenburg, 1998)'
_computing_publication_material  ' enCIFer (Allen et al., 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.4340
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Ruby, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) x-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0438
_diffrn_reflns_av_sigmaI/netI    0.0106
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            58185
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         76.03
_diffrn_reflns_theta_min         4.39
_exptl_absorpt_coefficient_mu    0.531
_exptl_absorpt_correction_T_max  0.937
_exptl_absorpt_correction_T_min  0.789
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.24a (release 19-12-2012 CrysAlis171 .NET)
(compiled Dec 19 2012,11:08:27)
Analytical numeric absorption correction using a multifaceted crystal
            model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    0.954
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.6631
_exptl_crystal_size_mid          0.1270
_exptl_crystal_size_min          0.1145
_refine_diff_density_max         0.085
_refine_diff_density_min         -0.083
_refine_diff_density_rms         0.022
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.095
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2804
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.095
_refine_ls_R_factor_all          0.0397
_refine_ls_R_factor_gt           0.0370
_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^)+(0.0641P)^2^+0.0895P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1086
_refine_ls_wR_factor_ref         0.1114
_reflns_number_gt                2616
_reflns_number_total             2804
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo400845m_si_005.cif
_cod_data_source_block           C20H39N3O4
_cod_database_code               4028403