Radical Additions of TEMPO to Ketenes: Correlation of Free Radical and Nucleophilic Reactivity
Allen, Annette D.; Cheng, Bernice; Fenwick, Michael H.; Huang, Wen-wei; Missiha, Sharif; Tahmassebi, Daryoush; Tidwell, Thomas T.; Organic Letters 1 (1999) 693–; doi:10.1021/ol990628i

data_1507556
_publ_section_title
;
 Radical Additions of TEMPO to Ketenes:&#x00A0; Correlation of Free
 Radical and Nucleophilic Reactivity
;
_journal_issue                   5
_journal_name_full               'Organic Letters'
_journal_page_first              693
_journal_paper_doi               10.1021/ol990628i
_journal_volume                  1
_journal_year                    1999
_chemical_formula_sum            'C26 H42 N2 O3'
_chemical_formula_weight         430.62
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                79.296(3)
_cell_angle_beta                 80.363(3)
_cell_angle_gamma                75.546(3)
_cell_formula_units_Z            2
_cell_length_a                   7.4729(4)
_cell_length_b                   12.4337(7)
_cell_length_c                   14.4929(9)
_cell_measurement_temperature    125.0(1)
_cell_volume                     1270.90(13)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'KappaCCD server software (Nonius, 1997)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL V5.1'
_computing_publication_material  'Bruker SHELXTL V5.1'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      125.0(1)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius Kappa-CCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.050
_diffrn_reflns_av_sigmaI/netI    0.0654
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11420
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         4.13
_exptl_absorpt_coefficient_mu    0.073
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.125
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'block cut from needle'
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.266
_refine_diff_density_min         -0.240
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       0.010(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         4460
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.0734
_refine_ls_R_factor_gt           0.0463
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0815P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1231
_refine_ls_wR_factor_ref         0.1359
_reflns_number_gt                3154
_reflns_number_total             4460
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol990628i.cif
_cod_data_source_block           k98148
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1507556