Lactide polymerization by well-defined calcium coordination complexes: comparisons with related magnesium and zinc chemistry
Chisholm, Malcolm H.; Gallucci, Judith; Phomphrai, Khamphee; Chemical Communications (Cambridge, United Kingdom)  (2003) 48–49; doi:10.1039/b208679d

data_7113897
_publ_section_title
;
 Lactide polymerization by well-defined calcium coordination complexes:
 comparisons with related magnesium and zinc chemistry
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   1
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              48
_journal_page_last               49
_journal_paper_doi               10.1039/b208679d
_journal_year                    2003
_chemical_formula_sum            'C42 H74 Ca N3 O Si2'
_chemical_formula_weight         733.30
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_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     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-93
_cell_angle_alpha                70.150(1)
_cell_angle_beta                 80.422(1)
_cell_angle_gamma                63.507(1)
_cell_formula_units_Z            2
_cell_length_a                   11.9120(1)
_cell_length_b                   13.2215(1)
_cell_length_c                   16.8877(1)
_cell_measurement_temperature    200(2)
_cell_volume                     2238.64(4)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO (Otwinowski & Minor, 1997)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measurement_device       'Nonius Kappa CCD'
_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  0.028
_diffrn_reflns_av_sigmaI/netI    0.0316
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_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            47522
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.04
_exptl_absorpt_coefficient_mu    0.226
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.088
_exptl_crystal_description       chunk
_exptl_crystal_F_000             806
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.31
_refine_diff_density_max         0.912
_refine_diff_density_min         -0.683
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.044
_refine_ls_goodness_of_fit_obs   1.095
_refine_ls_matrix_type           full
_refine_ls_number_parameters     456
_refine_ls_number_reflns         10257
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_restrained_S_obs      1.095
_refine_ls_R_factor_all          0.0633
_refine_ls_R_factor_obs          0.0479
_refine_ls_shift/esd_max         -0.034
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0660P)^2^+0.9247P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1362
_refine_ls_wR_factor_obs         0.1261
_reflns_number_observed          8070
_reflns_number_total             10257
_reflns_observed_criterion       >2sigma(I)
_cod_duplicate_entry             7103623
_cod_data_source_file            b208679d.txt
_cod_data_source_block           Chisholm1052
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0660P)^2^+0.9247P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0660P)^2^+0.9247P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        2238.64(3)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7113897