Tetrasubstituted Guanidinate Anions as Supporting Ligands in Organoyttrium Chemistry
Lu, Zhiping; Yap, Glenn P. A.; Richeson, Darrin S.; Organometallics 20 (2001) 706–; doi:10.1021/om0009029

data_4077243
_publ_section_title
;
 Tetrasubstituted Guanidinate Anions as Supporting Ligands in
 Organoyttrium Chemistry
;
_journal_issue                   4
_journal_name_full               Organometallics
_journal_page_first              706
_journal_paper_doi               10.1021/om0009029
_journal_volume                  20
_journal_year                    2001
_chemical_formula_sum            'C33 H83 N6 Si6 Y'
_chemical_formula_weight         821.50
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 108.0090(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.6891(19)
_cell_length_b                   10.8334(9)
_cell_length_c                   21.3807(18)
_cell_measurement_reflns_used    'reflections from 60 data frames'
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      1.47
_cell_volume                     4997.9(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.909
_diffrn_measured_fraction_theta_max 0.909
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0780
_diffrn_reflns_av_sigmaI/netI    0.0904
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            39253
_diffrn_reflns_theta_full        28.75
_diffrn_reflns_theta_max         28.75
_diffrn_reflns_theta_min         1.89
_diffrn_standards_decay_%        <1
_diffrn_standards_number         '50 standard frames at start and end'
_exptl_absorpt_coefficient_mu    1.337
_exptl_absorpt_correction_T_max  0.801528
_exptl_absorpt_correction_T_min  0.618366
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, Acta Cryst. (1995) A51 33-38.'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.092
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1784
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.594
_refine_diff_density_min         -0.489
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         11805
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.1045
_refine_ls_R_factor_gt           0.0454
_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^)+(0.0300P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0822
_refine_ls_wR_factor_ref         0.0895
_reflns_number_gt                6606
_reflns_number_total             11805
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om0009029.cif
_cod_data_source_block           dr090a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4077243