A Series of Bis(phosphinic)diamido Yttrium Complexes As Initiators for Lactide Polymerization
Rachel H. Platel; Andrew J. P. White; Charlotte K. Williams; Inorganic Chemistry 47 (2008) 6840–6849; doi:10.1021/ic800419t

data_4305422
_publ_section_title
;
A Series of Bis(phosphinic)diamido Yttrium Complexes As Initiators for
Lactide Polymerization
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6840
_journal_page_last               6849
_journal_paper_doi               10.1021/ic800419t
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         'C68 H88 N6 O4 P4 Si4 Y2'
_chemical_formula_sum            'C68 H88 N6 O4 P4 Si4 Y2'
_chemical_formula_weight         1467.50
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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_creation_method           SHELXL-97
_cell_angle_alpha                110.425(3)
_cell_angle_beta                 94.826(2)
_cell_angle_gamma                117.684(3)
_cell_formula_units_Z            1
_cell_length_a                   12.5447(3)
_cell_length_b                   13.3084(4)
_cell_length_c                   13.3297(4)
_cell_measurement_reflns_used    13024
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      32.4392
_cell_measurement_theta_min      3.7211
_cell_volume                     1763.55(12)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_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      173(2)
_diffrn_detector_area_resol_mean 15.9863
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.881
_diffrn_measurement_device_type  'OD Xcalibur 3'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0427
_diffrn_reflns_av_sigmaI/netI    0.0724
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            25979
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         32.55
_diffrn_reflns_theta_min         3.73
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.847
_exptl_absorpt_correction_T_max  0.790
_exptl_absorpt_correction_T_min  0.627
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
CrysAlis RED, Oxford Diffraction Ltd., 
Version 1.171.32.4 (release 27-04-2006 CrysAlis171 .NET) 
(compiled Apr 27 2007,17:53:11) 
Analytical numeric absorption correction using a multifaceted crystal 
model based on expressions derived by R.C. Clark & J.S. Reid. 
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897) 
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.382
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             764
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.449
_refine_diff_density_min         -0.476
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.132
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     430
_refine_ls_number_reflns         11274
_refine_ls_number_restraints     180
_refine_ls_restrained_S_all      1.164
_refine_ls_R_factor_all          0.0634
_refine_ls_R_factor_gt           0.0401
_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^)+(0.0374P)^2^+0.9587P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0963
_refine_ls_wR_factor_ref         0.1059
_reflns_number_gt                8273
_reflns_number_total             11274
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic800419t-file003_3.cif
_cod_data_source_block           Compound_16
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_database_code               4305422