Synthesis of a stable adduct of dialane(4) (Al2H4) via hydrogenation of a magnesium(I) dimer.
Bonyhady, Simon J.; Collis, David; Frenking, Gernot; Holzmann, Nicole; Jones, Cameron; Stasch, Andreas; Nature chemistry 2 (2010) 865–869; doi:10.1038/nchem.762

data_1508108
_publ_section_title
;
 Synthesis of a stable adduct of dialane(4) (Al2H4) via hydrogenation of a
 magnesium(I) dimer.
;
_journal_issue                   10
_journal_name_full               'Nature chemistry'
_journal_page_first              865
_journal_page_last               869
_journal_paper_doi               10.1038/nchem.762
_journal_volume                  2
_journal_year                    2010
_chemical_formula_sum            'C46 H60 Mg2 N4'
_chemical_formula_weight         717.60
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_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yac'
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_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                 101.70(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.475(3)
_cell_length_b                   8.2292(16)
_cell_length_c                   19.771(4)
_cell_measurement_temperature    123(2)
_cell_volume                     2146.8(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.0280
_diffrn_reflns_av_sigmaI/netI    0.0438
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            8944
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         2.99
_exptl_absorpt_coefficient_mu    0.091
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_exptl_absorpt_correction_T_min  0.952
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.110
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         5038
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0671
_refine_ls_R_factor_gt           0.0444
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0596P)^2^+0.5361P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1129
_refine_ls_wR_factor_ref         0.1252
_reflns_number_gt                3721
_reflns_number_total             5038
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            nchem.762-s2.cif
_cod_data_source_block           compound3
_cod_original_cell_volume        2146.8(7)
_cod_original_sg_symbol_H-M      P2/n
_cod_database_code               1508108