Mixed Phenyl and Thiophene Oligomers for Bridging Nitronyl Nitroxides.
Kolanji, Kubandiran; Ravat, Prince; Bogomyakov, Artem S.; Ovcharenko, Victor I.; Schollmeyer, Dieter; Baumgarten, Martin; The Journal of organic chemistry  (2017) –; doi:10.1021/acs.joc.7b00435

data_4032637
_publ_section_title
;
 Mixed Phenyl and Thiophene Oligomers for Bridging Nitronyl Nitroxides.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.7b00435
_journal_year                    2017
_chemical_formula_moiety         'C23 H45 Br N2 O2 S Si2'
_chemical_formula_sum            'C23 H45 Br N2 O2 S Si2'
_chemical_formula_weight         549.76
_chemical_name_systematic
;
2-(5-bromothiophen-2-yl)-1,3-bis((tert-butyldimethylsilyl)oxy)-
4,4,5,5-tetramethylimidazolidine
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 99.370(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   19.907(2)
_cell_length_b                   11.6503(9)
_cell_length_c                   12.8343(12)
_cell_measurement_reflns_used    2561
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      24.6451
_cell_measurement_theta_min      2.3755
_cell_volume                     2936.8(5)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'SMART APEX II'
_diffrn_measurement_method       '\w scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0462
_diffrn_reflns_av_unetI/netI     0.0742
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14646
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.936
_diffrn_reflns_theta_min         2.032
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    1.573
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5935
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.243
_exptl_crystal_description       block
_exptl_crystal_F_000             1168
_exptl_crystal_size_max          0.460
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.402
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.943
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     294
_refine_ls_number_reflns         7030
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.943
_refine_ls_R_factor_all          0.0850
_refine_ls_R_factor_gt           0.0465
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0561P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0996
_refine_ls_wR_factor_ref         0.1151
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4666
_reflns_number_total             7030
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo7b00435_si_002.cif
_cod_data_source_block           3
_cod_database_code               4032637
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.531
_shelx_estimated_absorpt_t_max   0.940
_shelx_res_checksum              26040
_shelx_hkl_checksum              99959