Aluminum dihydride from E(IV) precursors (E = Si, Ge) and its bond-activation reactivities.
Kumar, Hemant; Kelley, Steven P.; Batra, Tanya; Nagendran, Selvarajan; Walensky, Justin R.; Dalton transactions (Cambridge, England : 2003)  (2026) –; doi:10.1039/d6dt00474a

data_7720845
_publ_section_title
;
 Aluminum dihydride from E(IV) precursors (E = Si, Ge) and its
 bond-activation reactivities.
;
_journal_issue                   16
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6453
_journal_page_last               6461
_journal_paper_doi               10.1039/d6dt00474a
_journal_volume                  55
_journal_year                    2026
_chemical_formula_moiety         'C30 H47 Al N4'
_chemical_formula_sum            'C30 H47 Al N4'
_chemical_formula_weight         490.69
_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_date             2026-03-13
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2026-03-16 deposited with the CCDC.	2026-04-02 downloaded from the CCDC.
;
_cell_angle_alpha                97.307(4)
_cell_angle_beta                 109.658(4)
_cell_angle_gamma                106.332(4)
_cell_formula_units_Z            2
_cell_length_a                   9.7577(10)
_cell_length_b                   12.7902(14)
_cell_length_c                   13.6017(15)
_cell_measurement_reflns_used    9979
_cell_measurement_temperature    173.0
_cell_measurement_theta_max      26.38
_cell_measurement_theta_min      2.29
_cell_volume                     1487.2(3)
_computing_cell_refinement       'Bruker Apex4 V.2022.1-1/SAINT V8.40B'
_computing_data_collection       'Bruker Apex4 V.2022.1-1'
_computing_data_reduction        'Bruker Apex4 V.2022.1-1/SAINT V8.40B'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      173.0
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device_type  'Bruker Photon II CMOS area detector'
_diffrn_measurement_method       'shutterless omega and phi scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0779
_diffrn_reflns_av_unetI/netI     0.0571
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.960
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5846
_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.960
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.395
_diffrn_reflns_theta_min         2.059
_diffrn_source                   'Incoatec IMuS microfocus Mo tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.745372
_exptl_absorpt_correction_T_min  0.605727
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 TWINABS-2012/1 (Bruker,2012) was used for absorption correction.

Final HKLF 4 output contains 53935 reflections, Rint = 0.0779
 (26660 with I > 3sig(I), Rint = 0.0594)
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.096
_exptl_crystal_description       block
_exptl_crystal_F_000             536
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.489
_refine_diff_density_min         -0.562
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.242
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         5846
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.242
_refine_ls_R_factor_all          0.1544
_refine_ls_R_factor_gt           0.1046
_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^)+6.5281P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2255
_refine_ls_wR_factor_ref         0.2536
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4354
_reflns_number_total             5846
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d6dt00474a2.cif
_cod_data_source_block           s1
_cod_depositor_comments
'Adding full bibliography for 7720842--7720848.cif.'
_cod_database_code               7720845
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_max   0.995
_shelx_estimated_absorpt_t_min   0.990
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.692(4)
 0.308(4)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All Al(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
3.a Ternary CH refined with riding coordinates:
 C9(H9), C13(H13), C24(H24), C28(H28)
3.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B), C12(H12A,H12B), C23(H23A,H23B), C27(H27A,H27B)
3.c Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C18(H18), C19(H19), C20(H20),
 C21(H21), C22(H22)
3.d Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C11(H11A,H11B,H11C), C14(H14A,H14B,H14C), C15(H15A,H15B,
 H15C), C25(H25A,H25B,H25C), C26(H26A,H26B,H26C), C29(H29A,H29B,H29C), C30(H30A,
 H30B,H30C)
;
_shelx_res_checksum              32426
_olex2_submission_special_instructions 'No special instructions were received'