Synthetic and structural experiments on yttrium, cerium and magnesium trimethylsilylmethyls and their reaction products with nitriles; with a note on two cerium beta-diketiminates.
Avent, Anthony G.; Caro, Catherine F.; Hitchcock, Peter B.; Lappert, Michael F.; Li, Zhengning; Wei, Xue-Hong; Dalton transactions (Cambridge, England : 2003)  (2004) 1567–1577; doi:10.1039/b316695n

data_7013965
_publ_section_title
;
 Synthetic and structural experiments on yttrium, cerium and magnesium
 trimethylsilylmethyls and their reaction products with nitriles; with
 a note on two cerium beta-diketiminates.
;
_journal_issue                   10
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1567
_journal_page_last               1577
_journal_paper_doi               10.1039/b316695n
_journal_year                    2004
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C42 H58 Ce1 Cl1 N4 Si4'
_chemical_formula_sum            'C42 H58 Ce Cl N4 Si4'
_chemical_formula_weight         906.85
_chemical_name_common            '[CeCl{Me3SiNC(Ph)CHC(Ph)NSiMe3}2]'
_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_conform_dict_location     ftp://ftp.iucr.org/cifdics/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.1
_audit_creation_date             2001-08-08T11:24:00-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                94.607(4)
_cell_angle_beta                 94.084(5)
_cell_angle_gamma                90.114(4)
_cell_formula_units_Z            2
_cell_length_a                   11.9825(9)
_cell_length_b                   12.4284(10)
_cell_length_c                   15.9086(15)
_cell_measurement_reflns_used    9822
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      3.705
_cell_measurement_wavelength     0.71073
_cell_volume                     2355.4(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device       KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0917
_diffrn_reflns_av_unetI/netI     0.1599
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            15186
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         3.72
_exptl_absorpt_coefficient_mu    1.156
_exptl_absorpt_correction_T_max  0.911
_exptl_absorpt_correction_T_min  0.874
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
[c.f. r.h. blessing, acta cryst. (1995), a51, 33-38]
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.279
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             938
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.605
_refine_diff_density_min         -0.942
_refine_diff_density_rms         0.138
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.01
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     469
_refine_ls_number_reflns         8244
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.01
_refine_ls_R_factor_all          0.1252
_refine_ls_R_factor_gt           0.0689
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0267P)^2^+2.0647P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.107
_refine_ls_wR_factor_ref         0.1271
_reflns_number_gt                5313
_reflns_number_total             8244
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b316695n.txt
_cod_data_source_block           (16)-aug701
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7013965