Ligands and complexes based on piperidine and their exploitation of the ring opening polymerisation of rac-lactide.
McKeown, Paul; Brown-Humes, James; Davidson, Matthew G.; Mahon, Mary F.; Woodman, Timothy J.; Jones, Matthew D.; Dalton transactions (Cambridge, England : 2003) 46 (2017) 5048–5057; doi:10.1039/c7dt00751e

data_7042595
_publ_section_title
;
 Ligands and complexes based on piperidine and their exploitation of the
 ring opening polymerisation of rac-lactide.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5048
_journal_page_last               5057
_journal_paper_doi               10.1039/c7dt00751e
_journal_volume                  46
_journal_year                    2017
_chemical_formula_sum            'C21 H33 N2 O Zn0.5'
_chemical_formula_weight         362.18
_space_group_crystal_system      tetragonal
_space_group_IT_number           122
_space_group_name_Hall           'I -4 2bw'
_space_group_name_H-M_alt        'I -4 2 d'
_symmetry_space_group_name_Hall  'I -4 2bw'
_symmetry_space_group_name_H-M   'I -4 2 d'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-02-23 deposited with the CCDC.
2017-03-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   24.0450(2)
_cell_length_b                   24.0450(2)
_cell_length_c                   14.5399(2)
_cell_measurement_reflns_used    13457
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      71.5810
_cell_measurement_theta_min      3.5430
_cell_volume                     8406.42(15)
_computing_cell_refinement       'CrysAlisPro 1.171.38.43 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.43 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.43 (Rigaku OD, 2015)'
_computing_molecular_graphics
'ORTEP3 for Windows - Farrugia, L. J. J. Appl. Crystallogr. 1997, 30, 565'
_computing_publication_material
;
 'WinGX publication routines, Farrugia, 
 L. J., J. Appl. Crystallogr., 1999, 32, 837-838
;
_computing_structure_refinement
;
 SHELXL-2014/8 (Sheldrick, 2014)
 Sheldrick GM (2008) Acta Crystallogr A64:112--122 and 
 C. B. H\"ubschle, G. M. Sheldrick and B. Dittrich
 ShelXle: a Qt graphical user interface for SHELXL
 J. Appl. Cryst., 44, (2011) 1281-1284.
;
_computing_structure_solution
; 
 SHELXT
 Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
;
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1150
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_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  0.0298
_diffrn_reflns_av_unetI/netI     0.0179
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            28432
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         72.413
_diffrn_reflns_theta_min         3.552
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    1.086
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8698
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.145
_exptl_crystal_description       block
_exptl_crystal_F_000             3136
_exptl_crystal_size_max          0.050
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.169
_refine_diff_density_min         -0.373
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
;
 Flack x determined using 1711 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.033(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     292
_refine_ls_number_reflns         4148
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0283
_refine_ls_R_factor_gt           0.0259
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0390P)^2^+2.5096P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0657
_refine_ls_wR_factor_ref         0.0670
_reflns_Friedel_coverage         0.825
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.989
_reflns_number_gt                3940
_reflns_number_total             4148
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt00751e2.cif
_cod_data_source_block           S16MDJ13
_cod_depositor_comments
'Adding full bibliography for 7042587--7042595.cif.'
_cod_original_cell_volume        8406.42(18)
_cod_original_formula_sum        'C21 H33 N2 O Zn0.50'
_cod_database_code               7042595
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.948
_shelx_estimated_absorpt_t_max   0.948
_shelx_res_checksum              73799