Steric control of the reduction of carbodiimides by samarium(II) and the synthesis of very crowded samarium(III) complexes.
Cole, Marcus L.; Deacon, Glen B.; Forsyth, Craig M.; Junk, Peter C.; Polo Cerón, Dorian; Wang, Jun; Dalton transactions (Cambridge, England : 2003) 39 (2010) 6732–6738; doi:10.1039/b922031c

data_7024831
_publ_section_title
;
 Steric control of the reduction of carbodiimides by samarium(II) and the
 synthesis of very crowded samarium(III) complexes.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6732
_journal_page_last               6738
_journal_paper_doi               10.1039/b922031c
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C69 H93 N6 Sm, C6 H14'
_chemical_formula_sum            'C75 H107 N6 Sm'
_chemical_formula_weight         1243.02
_chemical_name_systematic
;
?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 101.980(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.4627(1)
_cell_length_b                   42.0049(5)
_cell_length_c                   13.4222(2)
_cell_measurement_reflns_used    33035
_cell_measurement_temperature    123(2)
_cell_volume                     6873.41(14)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    X-SEED
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  'Nonius KAPPA CCD'
_diffrn_measurement_method       'thin slice phi and omega scans'
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0877
_diffrn_reflns_av_sigmaI/netI    0.1012
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       49
_diffrn_reflns_limit_k_min       -44
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            54490
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.62
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.899
_exptl_absorpt_correction_T_max  0.87
_exptl_absorpt_correction_T_min  0.80
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SORTAV
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.201
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2644
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_platon_squeeze_details          ' ?'
_refine_diff_density_max         2.219
_refine_diff_density_min         -1.203
_refine_diff_density_rms         0.099
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.035(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.989
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1369
_refine_ls_number_reflns         23069
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.989
_refine_ls_R_factor_all          0.0851
_refine_ls_R_factor_gt           0.0630
_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^)+(0.0920P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1448
_refine_ls_wR_factor_ref         0.1560
_reflns_number_gt                17648
_reflns_number_total             23069
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b922031c.txt
_cod_data_source_block           jun9rsq
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7024831