Pyrrolide-Ligated Organoyttrium Complexes. Synthesis, Characterization, and Lactide Polymerization Behavior
Yang, Yi; Li, Shihui; Cui, Dongmei; Chen, Xuesi; Jing, Xiabin; Organometallics 26 (2007) 671–; doi:10.1021/om060781y

data_4072548
_publ_section_title
;
 Pyrrolide-Ligated Organoyttrium Complexes. Synthesis, Characterization,
 and Lactide Polymerization Behavior
;
_journal_issue                   3
_journal_name_full               Organometallics
_journal_page_first              671
_journal_paper_doi               10.1021/om060781y
_journal_volume                  26
_journal_year                    2007
_chemical_formula_sum            'C30.5 H47 N2 O Si2 Y'
_chemical_formula_weight         602.79
_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                 99.432(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.1563(12)
_cell_length_b                   20.818(2)
_cell_length_c                   17.4417(19)
_cell_measurement_reflns_used    1625
_cell_measurement_temperature    187(2)
_cell_measurement_theta_max      18.17
_cell_measurement_theta_min      2.26
_cell_volume                     3637.9(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      187(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.1104
_diffrn_reflns_av_sigmaI/netI    0.1451
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            21478
_diffrn_reflns_theta_full        26.07
_diffrn_reflns_theta_max         26.07
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    1.690
_exptl_absorpt_correction_T_max  0.8641
_exptl_absorpt_correction_T_min  0.6754
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_density_diffrn    1.101
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1276
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.746
_refine_diff_density_min         -0.385
_refine_diff_density_rms         0.108
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.974
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         7159
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.974
_refine_ls_R_factor_all          0.1597
_refine_ls_R_factor_gt           0.0742
_refine_ls_shift/su_max          0.103
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0995P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1672
_refine_ls_wR_factor_ref         0.2064
_reflns_number_gt                3658
_reflns_number_total             7159
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om060781ysi20060828_104035.cif
_cod_data_source_block           q019
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3638.0(7)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_original_formula_sum        'C30.50 H47 N2 O Si2 Y'
_cod_database_code               4072548