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_7018413
_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            'C35 H44 B2 O2 P2'
_chemical_formula_weight         580.26
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 109.266(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.866(2)
_cell_length_b                   15.561(4)
_cell_length_c                   12.610(3)
_cell_measurement_reflns_used    9887
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      2.47
_cell_volume                     1642.3(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0130
_diffrn_reflns_av_sigmaI/netI    0.0130
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            23762
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.162
_exptl_absorpt_correction_T_max  0.9402
_exptl_absorpt_correction_T_min  0.9186
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2008)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.173
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             620
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.39
_refine_diff_density_max         0.385
_refine_diff_density_min         -0.319
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.03(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     376
_refine_ls_number_reflns         7512
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0289
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0594P)^2^+0.2092P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0851
_refine_ls_wR_factor_ref         0.0857
_reflns_number_gt                7393
_reflns_number_total             7512
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt11954d.txt
_cod_data_source_block           ph10043_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        1642.3(6)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7018413