Lithium calix[4]arenes: structural studies and use in the ring opening polymerization of cyclic esters
Santoro, Orlando; Elsegood, Mark R. J.; Teat, Simon J.; Yamato, Takehiko; Redshaw, Carl; RSC Advances 11 (2021) 11304–11317; doi:10.1039/D1RA00175B

data_7242424
_publ_section_title
;
 Lithium calix[4]arenes: structural studies and use in the ring opening
 polymerization of cyclic esters
;
_journal_issue                   19
_journal_name_full               'RSC Advances'
_journal_page_first              11304
_journal_page_last               11317
_journal_paper_doi               10.1039/D1RA00175B
_journal_volume                  11
_journal_year                    2021
_chemical_formula_moiety
'C80 H110 Li6 O14, 0.78(C4 H8 O), 1.22(C6 H14)'
_chemical_formula_sum            'C90.45 H133.36 Li6 O14.77'
_chemical_formula_weight         1498.68
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-03-03 deposited with the CCDC.	2021-03-08 downloaded from the CCDC.
;
_cell_angle_alpha                114.022(7)
_cell_angle_beta                 95.245(6)
_cell_angle_gamma                111.486(6)
_cell_formula_units_Z            1
_cell_length_a                   13.350(8)
_cell_length_b                   13.868(9)
_cell_length_c                   14.564(9)
_cell_measurement_reflns_used    5206
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.3
_cell_measurement_theta_min      2.7
_cell_volume                     2198(2)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.874
_diffrn_measurement_device
;
AFC12 (Right): Kappa 3 circle
;
_diffrn_measurement_device_type
;
Rigaku Saturn724+ (2x2 bin mode)
;
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0392
_diffrn_reflns_av_unetI/netI     0.0619
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.874
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            29498
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.874
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         31.472
_diffrn_reflns_theta_min         2.822
_diffrn_source                   'Rotating Anode'
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.993
_exptl_absorpt_correction_T_min  0.980
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             812
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: tetrahydrofuran/hexane'
_exptl_crystal_size_max          0.280
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.090
_refine_diff_density_max         0.438
_refine_diff_density_min         -0.356
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     493
_refine_ls_number_reflns         12781
_refine_ls_number_restraints     119
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0969
_refine_ls_R_factor_gt           0.0712
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1043P)^2^+0.0278P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1912
_refine_ls_wR_factor_ref         0.2154
_reflns_Friedel_coverage         0.000
_reflns_number_gt                8911
_reflns_number_total             12781
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ra00175b2.cif
_cod_data_source_block           cr463
_cod_database_code               7242424
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.980
_shelx_estimated_absorpt_t_max   0.993
_shelx_res_checksum              18759
_shelx_fab_checksum              95073