CCC-Pincer Bis(carbene) Lanthanide Dibromides. Catalysis on Highlycis-1,4-Selective Polymerization of Isoprene and Active Species
Lv, Kui; Cui, Dongmei; Organometallics 29 (2010) 2987–; doi:10.1021/om1002039

data_4065933
_publ_section_title
;
 CCC-Pincer Bis(carbene) Lanthanide Dibromides. Catalysis on
 Highlycis-1,4-Selective Polymerization of Isoprene and Active Species
;
_journal_issue                   13
_journal_name_full               Organometallics
_journal_page_first              2987
_journal_paper_doi               10.1021/om1002039
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C48 H51 Br2 Cl2 N4 O Y'
_chemical_formula_weight         1019.56
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 112.7340(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   28.9383(12)
_cell_length_b                   13.7561(6)
_cell_length_c                   12.8059(5)
_cell_measurement_temperature    296(2)
_cell_volume                     4701.7(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0357
_diffrn_reflns_av_sigmaI/netI    0.0450
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            12823
_diffrn_reflns_theta_full        26.02
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         1.53
_exptl_absorpt_coefficient_mu    3.093
_exptl_absorpt_correction_T_max  0.6893
_exptl_absorpt_correction_T_min  0.5119
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.440
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2072
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.436
_refine_diff_density_min         -0.383
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     267
_refine_ls_number_reflns         4616
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0549
_refine_ls_R_factor_gt           0.0340
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0532P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0821
_refine_ls_wR_factor_ref         0.0990
_reflns_number_gt                3524
_reflns_number_total             4616
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om1002039_si_001.cif
_cod_data_source_block           complex_2
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4065933