Betaine-Carbene Interconversions. From N-Ylides to Zwitterionic N-Heterocyclic Carbene-Borane Adducts
Nazar Pidlypnyi; Jan C. Namyslo; Martin H. H. Drafz; Martin Nieger; Andreas Schmidt; Journal of Organic Chemistry 78 (2013) 1070–1079; doi:10.1021/jo302479p

data_4027921
_publ_contact_author
;
        Martin Nieger
        Laboratory of Inorganic Chemistry
        Department of Chemistry
        Universitity of Helsinki
        P.O. Box 55
        FIN-00014 University of Helsinki
        Finland
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_publ_contact_author_email       martin.nieger@helsinki.fi
_publ_contact_author_fax         '++358 9 191 50198'
_publ_contact_author_phone       '++358 9 191 50192'
_publ_section_title
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 Betaine-Carbene Interconversions. From N-Ylides to Zwitterionic
 N-Heterocyclic Carbene-Borane Adducts
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1070
_journal_page_last               1079
_journal_paper_doi               10.1021/jo302479p
_journal_volume                  78
_journal_year                    2013
_chemical_formula_moiety         'C23 H26 B N3'
_chemical_formula_sum            'C23 H26 B N3'
_chemical_formula_weight         355.28
_chemical_name_systematic
; 
 1-benzyl-11,11-diethyl-5-methyl-1,11-dihydroimidazol[2',1':3,4][1,4,2]-
 diazaborolo[1,5-a]indol-4-ium-11-uide
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 92.89(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.340(1)
_cell_length_b                   10.507(1)
_cell_length_c                   13.040(2)
_cell_measurement_reflns_used    122
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      1.0
_cell_volume                     1962.2(4)
_computing_cell_refinement       EVALCCD
_computing_data_collection       Collect
_computing_data_reduction        EVALCCD
_computing_molecular_graphics    XP
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method       'rotation in phi and omega, 2 deg.'
_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  0.0269
_diffrn_reflns_av_sigmaI/netI    0.0237
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20362
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.13
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_meas      ?
_exptl_crystal_description       blocks
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.250
_refine_diff_density_min         -0.227
_refine_diff_density_rms         0.039
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         4478
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0444
_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^)+(0.0558P)^2^+0.7444P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1097
_refine_ls_wR_factor_ref         0.1197
_reflns_number_gt                3602
_reflns_number_total             4478
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo302479p_si_001.cif
_cod_data_source_block           schm50_c_compound_23a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4027921