Constrained geometry scandium permethylindenyl complexes for the ring-opening polymerisation of l- and rac-lactide.
Diteepeng, Nichabhat; Buffet, Jean-Charles; Turner, Zoë R; O'Hare, Dermot; Dalton transactions (Cambridge, England : 2003) 48 (2019) 16099–16107; doi:10.1039/c9dt03450a

data_7701350
_publ_section_title
;
 Constrained geometry scandium permethylindenyl complexes for the
 ring-opening polymerisation of l- and rac-lactide.
;
_journal_issue                   42
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              16099
_journal_page_last               16107
_journal_paper_doi               10.1039/c9dt03450a
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C25 H45 B N O Sc Si'
_chemical_formula_sum            'C25 H45 B N O Sc Si'
_chemical_formula_weight         459.48
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014
_audit_update_record
;
2019-06-18 deposited with the CCDC.    2019-10-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.5450(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.69500(10)
_cell_length_b                   18.2950(2)
_cell_length_c                   17.0861(2)
_cell_measurement_reflns_used    14427
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      76.5580
_cell_measurement_theta_min      3.5910
_cell_volume                     2642.37(5)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_molecular_graphics
;
ORTEP3 for Windows. Farrugia, L. J. J. Appl. Cryst. 1997, 30, 565.
;
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution
;
SUPERFLIP 
Palatinus, L.; Chapuis, G. J. Appl. Cryst. 2007, 40, 786-790.
;
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.01(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 10.5035
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at home/near, Atlas'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0194
_diffrn_reflns_av_unetI/netI     0.0143
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            21867
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         74.494
_diffrn_reflns_theta_min         3.594
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    2.916
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.83931
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.46 (Rigaku Oxford Diffraction, 2018)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.155
_exptl_crystal_description       prism
_exptl_crystal_F_000             1000
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Benzene'
_exptl_crystal_size_max          0.321
_exptl_crystal_size_mid          0.208
_exptl_crystal_size_min          0.144
_refine_diff_density_max         0.272
_refine_diff_density_min         -0.240
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.833
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         5406
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.833
_refine_ls_R_factor_all          0.0304
_refine_ls_R_factor_gt           0.0293
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0735P)^2^+1.2640P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0913
_refine_ls_wR_factor_ref         0.0925
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5189
_reflns_number_total             5406
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt03450a2.cif
_cod_data_source_block           095ZRT18
_cod_depositor_comments
'Adding full bibliography for 7701349--7701351.cif.'
_cod_database_code               7701350
_shelx_estimated_absorpt_t_min   0.455
_shelx_estimated_absorpt_t_max   0.679
_shelxl_version_number           2014-3
_shelx_res_checksum              15866