Ring-opening polymerisation of rac-lactide mediated by cationic zinc complexes featuring P-stereogenic bisphosphinimine ligands.
Sun, Hongsui; Ritch, Jamie S.; Hayes, Paul G.; Dalton transactions (Cambridge, England : 2003) 41 (2012) 3701–3713; doi:10.1039/c2dt11954d

data_7018409
_publ_section_title
;
 Ring-opening polymerisation of rac-lactide mediated by cationic zinc
 complexes featuring P-stereogenic bisphosphinimine ligands.
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3701
_journal_page_last               3713
_journal_paper_doi               10.1039/c2dt11954d
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C74 H57 B F20 N2 O P2'
_chemical_formula_weight         1442.97
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 99.0010(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.8759(16)
_cell_length_b                   19.0247(17)
_cell_length_c                   39.597(4)
_cell_measurement_temperature    173(2)
_cell_volume                     13300(2)
_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      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_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  0.1609
_diffrn_reflns_av_sigmaI/netI    0.1768
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -51
_diffrn_reflns_number            190763
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         1.57
_exptl_absorpt_coefficient_mu    0.169
_exptl_absorpt_correction_T_max  0.9849
_exptl_absorpt_correction_T_min  0.9554
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, R. H. (1995) Acta Cryst. A51, 33-38'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.441
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             5904
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.560
_refine_diff_density_min         -0.458
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.839
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1786
_refine_ls_number_reflns         30607
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.840
_refine_ls_R_factor_all          0.2007
_refine_ls_R_factor_gt           0.0611
_refine_ls_shift/su_max          0.028
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0741P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1436
_refine_ls_wR_factor_ref         0.1839
_reflns_number_gt                10176
_reflns_number_total             30607
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt11954d.txt
_cod_data_source_block           ph10058_0m
_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        13301(2)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7018409