Group 4 complexes of amine bis(phenolate)s and their application for the ring opening polymerisation of cyclic esters.
Chmura, Amanda J.; Davidson, Matthew G.; Jones, Matthew D.; Lunn, Matthew D.; Mahon, Mary F.; Dalton transactions (Cambridge, England : 2003)  (2006) 887–889; doi:10.1039/b513345a

data_7006726
_publ_section_title
;
 Group 4 complexes of amine bis(phenolate)s and their application for
 the ring opening polymerisation of cyclic esters.
;
_journal_issue                   7
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              887
_journal_page_last               889
_journal_paper_doi               10.1039/b513345a
_journal_year                    2006
_chemical_formula_moiety         'C38 H46 N2 O4 Zr, 4(C H2 Cl2) '
_chemical_formula_sum            'C42 H54 Cl8 N2 O4 Zr'
_chemical_formula_weight         1025.69
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 100.9820(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.8020(2)
_cell_length_b                   14.4540(2)
_cell_length_c                   17.7450(2)
_cell_measurement_reflns_used    4315
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      3.51
_cell_volume                     4734.14(10)
_computing_cell_refinement       'HKL Scalepack (Otwinski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'HKL Denzo & Scalepack (Otwinski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
SIR97- Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C. ,
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
(1999) J. Appl. Cryst. 32, 115-119.
;
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       CCD
_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  0.0095
_diffrn_reflns_av_sigmaI/netI    0.0196
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            8093
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.58
_exptl_absorpt_coefficient_mu    0.725
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.439
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       prism
_exptl_crystal_F_000             2112
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.734
_refine_diff_density_min         -0.786
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         4144
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0373
_refine_ls_R_factor_gt           0.0349
_refine_ls_shift/su_max          0.050
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0405P)^2^+12.8575P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0921
_refine_ls_wR_factor_ref         0.0936
_reflns_number_gt                3898
_reflns_number_total             4144
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b513345a.txt
_cod_data_source_block           Zr(1a)2
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7006726