Improving Grubbs' II type ruthenium catalysts by appropriately modifying the N-heterocyclic carbene ligand.
Vieille-Petit, Ludovic; Luan, Xinjun; Gatti, Michele; Blumentritt, Sascha; Linden, Anthony; Clavier, Hervé; Nolan, Steven P; Dorta, Reto; Chemical communications (Cambridge, England) 34 (2009) 3783–3785; doi:10.1039/b904634h

data_7104573
_publ_section_title
;
 Improving Grubbs' II type ruthenium catalysts by appropriately
 modifying the N-heterocyclic carbene ligand.
;
_journal_issue                   25
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              3783
_journal_page_last               3785
_journal_paper_doi               10.1039/b904634h
_journal_volume                  34
_journal_year                    2009
_chemical_formula_moiety         'C60 H77 Cl2 N2 P Ru, 2(C H2 Cl2)'
_chemical_formula_sum            'C62 H81 Cl6 N2 P Ru'
_chemical_formula_weight         1199.03
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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_date             08-07-08
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.2229(5)
_cell_angle_beta                 99.1757(6)
_cell_angle_gamma                113.2695(5)
_cell_formula_units_Z            2
_cell_length_a                   11.6690(1)
_cell_length_b                   13.4007(1)
_cell_length_c                   20.8987(2)
_cell_measurement_reflns_used    128764
_cell_measurement_temperature    160(1)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.0
_cell_volume                     2950.90(4)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2000)'
_computing_data_reduction
'DENZO-SMN and SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'SHELXL97 and PLATON (Spek, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      160(1)
_diffrn_detector                 '65 mm CCD camera on \k goniostat'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Nonius KappaCCD area-detector diffractometer'
_diffrn_measurement_method       '\f and \w scans with \k offsets'
_diffrn_radiation_monochromator  'horizontally mounted graphite crystal'
_diffrn_radiation_source         'Nonius FR590 sealed tube generator'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0604
_diffrn_reflns_av_sigmaI/netI    0.0351
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            70098
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.00
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.604
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.943
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Blessing, 1995)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.349
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1256
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.742
_refine_diff_density_min         -1.751
_refine_diff_density_rms         0.087
_refine_ls_extinction_coef       0.0014(3)
_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   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     650
_refine_ls_number_reflns         10403
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0591
_refine_ls_R_factor_gt           0.0459
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0539P)^2^+6.7226P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1156
_refine_ls_wR_factor_ref         0.1239
_reflns_number_gt                8712
_reflns_number_total             10403
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            b904634h.txt
_cod_data_source_block           2e
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               7104573