Synthesis of electronically diverse tetraarylimidazolylidene carbenes via catalytic aldimine coupling.
Ogle, James W.; Zhang, Jubo; Reibenspies, Joseph H.; Abboud, Khalil A.; Miller, Stephen A.; Organic letters 10 (2008) 3677–3680; doi:10.1021/ol8012765

data_1504800
_publ_section_title
;
 Synthesis of electronically diverse tetraarylimidazolylidene carbenes via
 catalytic aldimine coupling.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              3677
_journal_page_last               3680
_journal_paper_doi               10.1021/ol8012765
_journal_volume                  10
_journal_year                    2008
_chemical_formula_sum            'C29.38 H19.75 Cl1.5 F6 N2'
_chemical_formula_weight         567.90
_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

The Alert Level A and B distance errors are intermolecular distances to
disordered CH2Cl2 included solvents.  CIFCHECK cannot resolve the situation
properly. The distances reported, while short, are acceptable for disordered
molecules that cannot be refined as well as the non-disordered portion of the
structure.

The Alert Level A report of _diffrn_measured_fraction_theta_full Low = 0.90
indicates 90% coverage and is inherent to the particular data set. This is
not unusual or a fatal flaw.  While the coverage could be increased with
recollection on a different crystal, little would be gained regarding identity
and connectivity of the determined molecular structure.
;
_cell_angle_alpha                98.285(5)
_cell_angle_beta                 90.679(5)
_cell_angle_gamma                95.983(5)
_cell_formula_units_Z            4
_cell_length_a                   10.757(3)
_cell_length_b                   15.673(5)
_cell_length_c                   15.764(5)
_cell_measurement_reflns_used    897
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     2614.7(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.901
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0394
_diffrn_reflns_av_sigmaI/netI    0.0546
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            18703
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.31
_exptl_absorpt_coefficient_mu    0.262
_exptl_absorpt_correction_T_max  0.9494
_exptl_absorpt_correction_T_min  0.9023
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.443
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1158
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.583
_refine_diff_density_min         -0.516
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     833
_refine_ls_number_reflns         8310
_refine_ls_number_restraints     366
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.1056
_refine_ls_R_factor_gt           0.0890
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0400P)^2^+14.5000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1784
_refine_ls_wR_factor_ref         0.1878
_reflns_number_gt                6890
_reflns_number_total             8310
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol8012765_si_002.cif
_cod_data_source_block           sm121
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        2614.6(13)
_cod_original_sg_symbol_H-M      P-1
_cod_original_formula_sum        'C29.38 H19.75 Cl1.50 F6 N2'
_cod_database_code               1504800