Aluminum containing molecular bowls and pyridinophanes: use of pyridine modules to access different molecular topologies.
Bawari, Deependra; Negi, Chandrakala; Porwal, Vishal Kumar; Ravi, Satyam; Shamasundar, K. R.; Singh, Sanjay; Dalton transactions (Cambridge, England : 2003) 48 (2019) 7442–7450; doi:10.1039/c8dt05105d

data_7049786
_publ_section_title
;
 Aluminum containing molecular bowls and pyridinophanes: use of pyridine
 modules to access different molecular topologies.
;
_journal_issue                   21
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7442
_journal_page_last               7450
_journal_paper_doi               10.1039/c8dt05105d
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C16.5 H31.5 Al N4.5 Si3'
_chemical_formula_sum            'C16.5 H31.5 Al N4.5 Si3'
_chemical_formula_weight         404.21
_space_group_crystal_system      orthorhombic
_space_group_IT_number           20
_space_group_name_Hall           'C 2c 2'
_space_group_name_H-M_alt        'C 2 2 21'
_symmetry_space_group_name_Hall  'C 2c 2'
_symmetry_space_group_name_H-M   'C 2 2 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-03-12
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-03-13 deposited with the CCDC.    2019-04-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.001(3)
_cell_length_b                   20.578(4)
_cell_length_c                   14.373(2)
_cell_measurement_reflns_used    4283
_cell_measurement_temperature    100.0(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.1
_cell_volume                     5028.3(15)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100.0(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.949
_diffrn_measurement_device_type  'Rigaku CrystalClear-SM Expert 2.0 r15'
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0691
_diffrn_reflns_av_unetI/netI     0.1411
_diffrn_reflns_Laue_measured_fraction_full 0.965
_diffrn_reflns_Laue_measured_fraction_max 0.949
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            6914
_diffrn_reflns_point_group_measured_fraction_full 0.942
_diffrn_reflns_point_group_measured_fraction_max 0.920
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         27.499
_diffrn_reflns_theta_min         3.233
_diffrn_source                   'Sealed Tube'
_exptl_absorpt_coefficient_mu    0.232
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.392
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing 1995'
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.068
_exptl_crystal_description       block
_exptl_crystal_F_000             1736
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.394
_refine_diff_density_min         -0.399
_refine_diff_density_rms         0.070
_refine_ls_abs_structure_details
;
 Flack x determined using 796 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.0(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.987
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         5335
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.987
_refine_ls_R_factor_all          0.1139
_refine_ls_R_factor_gt           0.0711
_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^)+(0.0499P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1331
_refine_ls_wR_factor_ref         0.1635
_reflns_Friedel_coverage         0.763
_reflns_Friedel_fraction_full    0.912
_reflns_Friedel_fraction_max     0.885
_reflns_number_gt                3160
_reflns_number_total             5335
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt05105d2.cif
_cod_data_source_block           compound7
_cod_depositor_comments
'Adding full bibliography for 7049785--7049788.cif.'
_cod_original_cell_volume        5028.3(16)
_cod_original_formula_sum        'C16.50 H31.50 Al N4.50 Si3'
_cod_database_code               7049786
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_max   0.949
_shelx_estimated_absorpt_t_min   0.944
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C5(H5), C6(H6), C7(H7), C16(H16), C17(H17)
2.b Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C2(H2A,H2B,H2C), C3(H3A,H3B,H3C), C9(H9A,H9B,H9C), C10(H10A,
 H10B,H10C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C13(H13A,H13B,H13C),
 C14(H14A,H14B,H14C)
;
_olex2_submission_special_instructions 'No special instructions were received'