The Unique Decomposition Behavior of the Dimeric Dialkylaluminum Hydrazide [(Me3C)2Al-N(H)-N(H)-Me]2-Butane versus Ammonia Elimination
Werner Uhl; Thomas Abel; Alexander Hepp; Tom Nilges; Friedhelm Rogel; Ernst-Ulrich Würthwein; Nugzar Ghavtadze; Inorganic Chemistry 48 (2009) 752–759; doi:10.1021/ic8016134

data_4301211
_publ_section_title
;
The Unique Decomposition Behavior of the Dimeric Dialkylaluminum Hydrazide
[(Me3C)2Al-N(H)-N(H)-Me]2-Butane versus Ammonia Elimination
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              752
_journal_page_last               759
_journal_paper_doi               10.1021/ic8016134
_journal_volume                  48
_journal_year                    2009
_chemical_formula_sum            'C20 H52 Al4 N8'
_chemical_formula_weight         512.62
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           86
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4bc'
_symmetry_space_group_name_H-M   'P 42/n :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.6325(3)
_cell_length_b                   12.6325(3)
_cell_length_c                   9.5575(3)
_cell_measurement_temperature    153(2)
_cell_volume                     1525.19(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1454
_diffrn_reflns_av_sigmaI/netI    0.0631
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            9102
_diffrn_reflns_theta_full        26.06
_diffrn_reflns_theta_max         26.06
_diffrn_reflns_theta_min         1.61
_exptl_absorpt_coefficient_mu    0.175
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.116
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.586
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     83
_refine_ls_number_reflns         1501
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0479
_refine_ls_R_factor_gt           0.0448
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0846P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1199
_refine_ls_wR_factor_ref         0.1214
_reflns_number_gt                1348
_reflns_number_total             1501
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic8016134_si_003.cif
_cod_data_source_block           C20H52Al4N8
_cod_original_sg_symbol_H-M      'P 42/n'
_cod_database_code               4301211