Crown ether complexes of potassium quinolin-8-olates: synthesis, characterization and catalysis toward the ring-opening polymerization of rac-lactide
Wu, Bing-Bing; Wang, Zhong-Xia; RSC Adv. 7 (2017) 11657–; doi:10.1039/C7RA01186E

data_7227705
_publ_section_title
;
 Crown ether complexes of potassium quinolin-8-olates: synthesis,
 characterization and catalysis toward the ring-opening polymerization of
 rac-lactide
;
_journal_issue                   19
_journal_name_full               'RSC Adv.'
_journal_page_first              11657
_journal_paper_doi               10.1039/C7RA01186E
_journal_volume                  7
_journal_year                    2017
_chemical_formula_sum            'C25 H38 K N O8'
_chemical_formula_weight         519.66
_chemical_properties_physical    ', Moisture-sensitive'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2016-10-10 deposited with the CCDC.
2017-02-10 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 106.388(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.4725(12)
_cell_length_b                   8.3765(7)
_cell_length_c                   22.2908(19)
_cell_measurement_reflns_used    2383
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      25.611
_cell_measurement_theta_min      2.745
_cell_volume                     2771.6(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      298(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0584
_diffrn_reflns_av_sigmaI/netI    0.0761
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            13547
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.61
_exptl_absorpt_coefficient_mu    0.237
_exptl_absorpt_correction_T_max  0.9767
_exptl_absorpt_correction_T_min  0.9586
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1112
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent: THF'
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         4867
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.1088
_refine_ls_R_factor_gt           0.0490
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0255P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0873
_refine_ls_wR_factor_ref         0.0961
_reflns_number_gt                2566
_reflns_number_total             4867
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra01186e2.cif
_cod_data_source_block           160228a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7227705