Well-defined N-heterocyclic carbene silver halides of 1-cyclohexyl-3-arylmethylimidazolylidenes: synthesis, structure and catalysis in A(3)-reaction of aldehydes, amines and alkynes.
Li, Yanbo; Chen, Xiaofeng; Song, Yin; Fang, Ling; Zou, Gang; Dalton transactions (Cambridge, England : 2003) 40 (2011) 2046–2052; doi:10.1039/c0dt01074j

data_7014697
_publ_section_title
;
 Well-defined N-heterocyclic carbene silver halides of
 1-cyclohexyl-3-arylmethylimidazolylidenes: synthesis, structure and
 catalysis in A(3)-reaction of aldehydes, amines and alkynes.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2046
_journal_page_last               2052
_journal_paper_doi               10.1039/c0dt01074j
_journal_volume                  40
_journal_year                    2011
_chemical_formula_sum            'C20 H22 Ag Br N2'
_chemical_formula_weight         478.18
_chemical_name_systematic
;
?
;
_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                78.320(2)
_cell_angle_beta                 68.860(2)
_cell_angle_gamma                84.966(2)
_cell_formula_units_Z            2
_cell_length_a                   9.5958(14)
_cell_length_b                   10.0014(14)
_cell_length_c                   10.5225(15)
_cell_measurement_reflns_used    2829
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      55.638
_cell_measurement_theta_min      5.004
_cell_volume                     922.3(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_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  0.1014
_diffrn_reflns_av_sigmaI/netI    0.0728
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            5043
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    3.262
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.3963
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.722
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             476
_exptl_crystal_size_max          0.369
_exptl_crystal_size_mid          0.307
_exptl_crystal_size_min          0.231
_refine_diff_density_max         1.492
_refine_diff_density_min         -1.421
_refine_diff_density_rms         0.166
_refine_ls_extinction_coef       0.0071(19)
_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   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3548
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0599
_refine_ls_R_factor_gt           0.0539
_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^)+(0.0925P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1375
_refine_ls_wR_factor_ref         0.1412
_reflns_number_gt                3023
_reflns_number_total             3548
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C0DT01074J.TXT
_cod_data_source_block           cd20168
_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_enum 1555 2011-01-17 13:19:09Z saulius 
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_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7014697