Trends in benzene inverse sandwich complexes of the alkaline-earth metals Mg, Ca, Sr and Ba.
Jędrzkiewicz, Dawid; Morasch, Michael; Townrow, Oliver P. E.; Rösch, Bastian; Langer, Jens; Mathe, Zachary; Harder, Sjoerd; Chemical science 16 (2025) 17793–17802; doi:10.1039/d5sc05373k

data_1575570
_publ_section_title
;
 Trends in benzene inverse sandwich complexes of the alkaline-earth metals
 Mg, Ca, Sr and Ba.
;
_journal_issue                   38
_journal_name_full               'Chemical science'
_journal_page_first              17793
_journal_page_last               17802
_journal_paper_doi               10.1039/d5sc05373k
_journal_volume                  16
_journal_year                    2025
_chemical_formula_moiety         'C86 H138 I2 N4 Sr2'
_chemical_formula_sum            'C86 H138 I2 N4 Sr2'
_chemical_formula_weight         1657.04
_chemical_properties_physical    Moisture-sensitive
_space_group_crystal_system      tetragonal
_space_group_IT_number           142
_space_group_name_Hall           '-I 4bd 2c'
_space_group_name_H-M_alt        'I 41/a c d :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2025-03-13
_audit_creation_method
;
Olex2 1.5
(compiled 2025.03.04 svn.red2d20d0 for OlexSys, GUI svn.r7188)
;
_audit_update_record
;
2025-03-28 deposited with the CCDC.	2025-08-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   19.8990(2)
_cell_length_b                   19.8990(2)
_cell_length_c                   42.0248(10)
_cell_measurement_reflns_used    5754
_cell_measurement_temperature    100.01(10)
_cell_measurement_theta_max      72.1140
_cell_measurement_theta_min      5.0700
_cell_volume                     16640.6(5)
_computing_cell_refinement       'CrysAlisPro 1.171.42.72a (Rigaku OD, 2022)'
_computing_data_collection       'CrysAlisPro 1.171.42.72a (Rigaku OD, 2022)'
_computing_data_reduction        'CrysAlisPro 1.171.42.72a (Rigaku OD, 2022)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2019/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      100.01(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.2903
_diffrn_detector_type            AtlasS2
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w    -50.00  17.00   1.00    9.16    --  -41.15  38.00-150.00   67
  2  \w    -20.00  39.00   1.00    9.16    --   41.15 -77.00-120.00   59
  3  \w    107.00 159.00   1.00   36.65    --  104.35  77.00  30.00   52
  4  \w     33.00 112.00   1.00   36.65    --  104.35-125.00 -90.00   79
  5  \w     23.00 106.00   1.00   36.65    --  104.35 -94.00  30.00   83
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at home/near, AtlasS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0587659000
_diffrn_orient_matrix_UB_12      -0.0501004000
_diffrn_orient_matrix_UB_13      -0.0032854000
_diffrn_orient_matrix_UB_21      0.0096487000
_diffrn_orient_matrix_UB_22      -0.0007965000
_diffrn_orient_matrix_UB_23      -0.0363840000
_diffrn_orient_matrix_UB_31      0.0494424000
_diffrn_orient_matrix_UB_32      -0.0590128000
_diffrn_orient_matrix_UB_33      0.0031437000
_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  0.0265
_diffrn_reflns_av_unetI/netI     0.0210
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.986
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       50
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            15954
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.986
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         72.584
_diffrn_reflns_theta_min         3.781
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    7.832
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.234
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.42.72a (Rigaku Oxford Diffraction, 2022)
Numerical absorption correction based on gaussian integration over
a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_description       plank
_exptl_crystal_F_000             6912
_exptl_crystal_size_max          0.305
_exptl_crystal_size_mid          0.096
_exptl_crystal_size_min          0.026
_refine_diff_density_max         0.917
_refine_diff_density_min         -0.579
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         4084
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0373
_refine_ls_R_factor_gt           0.0299
_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^)+(0.0374P)^2^+30.0604P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0736
_refine_ls_wR_factor_ref         0.0782
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3508
_reflns_number_total             4084
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5sc05373k2.cif
_cod_data_source_block           hasj221212a
_cod_depositor_comments
'Adding full bibliography for 1575569--1575577.cif.'
_cod_original_cell_volume        16640.6(6)
_cod_original_sg_symbol_H-M      'I 41/a c d'
_cod_database_code               1575570
_shelx_shelxl_version_number     2019/3
_chemical_oxdiff_formula         C86H138I2N4Sr2
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C13(H13), C18(H18)
2.b Secondary CH2 refined with riding coordinates:
 C14(H14a,H14b), C16(H16a,H16b), C19(H19a,H19b), C21(H21a,H21b)
2.c Aromatic/amide H refined with riding coordinates:
 C1(H1), C9(H9), C10(H10), C11(H11)
2.d Idealised Me refined as rotating group:
 C4(H4a,H4b,H4c), C5(H5a,H5b,H5c), C6(H6a,H6b,H6c), C15(H15a,H15b,H15c),
 C17(H17a,H17b,H17c), C20(H20a,H20b,H20c), C22(H22a,H22b,H22c)
;
_shelx_res_checksum              64491
_olex2_date_sample_data_collection 2022-12-12
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.477
_oxdiff_exptl_absorpt_empirical_full_min 0.727