N-Functionalised heterocyclic carbene complexes of silver
Tulloch, Arran A. D.; Danopoulos, Andreas A.; Winston, Scott; Kleinhenz, Sven; Eastham, Graham; Journal of the Chemical Society, Dalton Transactions  (2000) 4499–; doi:10.1039/b007504n

data_7010266
_publ_section_title
;
 N-Functionalised heterocyclic carbene complexes of silver
;
_journal_issue                   24
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              4499
_journal_paper_doi               10.1039/b007504n
_journal_year                    2000
_chemical_formula_moiety         'C20 H23 Ag1 Br1 N3'
_chemical_formula_sum            'C20 H23 Ag Br N3'
_chemical_formula_weight         493.19
_chemical_name_common            'Compound X'
_chemical_name_systematic
;
3-(2,6-di-isopropylphenyl)-1-(2-pyridyl)-imidazol-2-ylidene 
silver bromide 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 103.155(2)
_cell_angle_gamma                90.000(2)
_cell_formula_units_Z            4
_cell_length_a                   10.8837(4)
_cell_length_b                   16.4154(6)
_cell_length_c                   11.4127(4)
_cell_measurement_reflns_used    2474
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      30.034
_cell_measurement_theta_min      0.998
_cell_volume                     1985.49(13)
_computing_cell_refinement       'Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'Denzo a. Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean '9.091 pixels/mm'
_diffrn_measured_fraction_theta_full 0.602
_diffrn_measured_fraction_theta_max 0.602
_diffrn_measurement_device_type  'Enraf Nonius KappaCCD area detector'
_diffrn_measurement_method       '\p and \q scans to fill Ewald sphere'
_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  0.0331
_diffrn_reflns_av_sigmaI/netI    0.0651
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2801
_diffrn_reflns_theta_full        25.24
_diffrn_reflns_theta_max         25.24
_diffrn_reflns_theta_min         2.21
_diffrn_standards_decay_%        n/a
_diffrn_standards_interval_count n/a
_diffrn_standards_interval_time  n/a
_diffrn_standards_number         n/a
_exptl_absorpt_coefficient_mu    3.035
_exptl_absorpt_correction_T_max  0.7933
_exptl_absorpt_correction_T_min  0.5175
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SORTAV - multi-scan from symmetry-related measurements (R.H. Blessing, 1995-1997
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.650
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.113
_refine_diff_density_min         -0.735
_refine_diff_density_rms         0.163
_refine_ls_extinction_coef       0.0086(13)
_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   1.114
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         2167
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.114
_refine_ls_R_factor_all          0.0519
_refine_ls_R_factor_gt           0.0454
_refine_ls_shift/su_max          0.071
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0849P)^2^+1.8357P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1304
_refine_ls_wR_factor_ref         0.1391
_reflns_number_gt                1913
_reflns_number_total             2167
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b007504n.txt
_cod_data_source_block           8
_cod_original_cell_volume        1985.49(12)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7010266