A new class of anionic metallohelicates based on salicylic and terephthalic acid units, accessible in solution and by mechanochemistry.
Do, Jean-Louis; Titi, Hatem M.; Cuccia, Louis A.; Friščić, Tomislav; Chemical communications (Cambridge, England) 57 (2021) 5143–5146; doi:10.1039/d0cc08180a

data_7128192
_publ_section_title
;
 A new class of anionic metallohelicates based on salicylic and
 terephthalic acid units, accessible in solution and by mechanochemistry.
;
_journal_issue                   42
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              5143
_journal_page_last               5146
_journal_paper_doi               10.1039/d0cc08180a
_journal_volume                  57
_journal_year                    2021
_chemical_formula_sum            'C84 H86 Fe2 N12 O26'
_chemical_formula_weight         1791.34
_chemical_name_systematic
'(H2TMEDA)3Fe2(N,N'-bis(3-carboxylate-2-hydroxyphenyl)terephthalamide )3.DMF'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           34
_space_group_name_Hall           'P 2 -2n'
_space_group_name_H-M_alt        'P n n 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2021-04-08 deposited with the CCDC.	2021-04-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   23.0817(5)
_cell_length_b                   23.3506(5)
_cell_length_c                   10.0089(2)
_cell_measurement_reflns_used    7312
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      72.397
_cell_measurement_theta_min      2.692
_cell_volume                     5394.5(2)
_computing_cell_refinement       'Bruker APEX3'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker APEX3'
_computing_molecular_graphics    'Mercury 4.0 (Wood 2020)'
_computing_publication_material  'enCIFer 2020.2.0'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker AXS D8'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0962
_diffrn_reflns_av_unetI/netI     0.0637
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            81953
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.397
_diffrn_reflns_theta_min         2.692
_exptl_absorpt_coefficient_mu    2.728
_exptl_absorpt_correction_T_max  0.7514
_exptl_absorpt_correction_T_min  0.5807
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXScale'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.103
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1868
_exptl_crystal_size_max          0.430
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.250
_refine_diff_density_max         0.246
_refine_diff_density_min         -0.278
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.218(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     566
_refine_ls_number_reflns         10327
_refine_ls_number_restraints     488
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0797
_refine_ls_R_factor_gt           0.0526
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0858P)^2^+0.2294P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1399
_refine_ls_wR_factor_ref         0.1593
_reflns_Friedel_coverage         0.887
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                7319
_reflns_number_total             10327
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0cc08180a2.cif
_cod_data_source_block           FeH3r
_cod_depositor_comments
'Adding full bibliography for 7128186--7128192.cif.'
_cod_database_code               7128192
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.387
_shelx_estimated_absorpt_t_max   0.549
_shelx_res_checksum              46063
_shelx_fab_checksum              46568