Synthesis and reactivity of bis-pentamethylcyclopentadienyl diiododialane (Cp*AlI)2: an aluminium(II) precursor to (Cp*Al)4.
Minasian, Stefan G; Arnold, John; Chemical communications (Cambridge, England)  (2008) 4043–4045; doi:10.1039/b806804f

data_7103311
_publ_section_title
;
 Synthesis and reactivity of bis-pentamethylcyclopentadienyl
 diiododialane (Cp*AlI)2: an aluminium(II) precursor to (Cp*Al)4.
;
_journal_issue                   34
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4043
_journal_page_last               4045
_journal_paper_doi               10.1039/b806804f
_journal_year                    2008
_chemical_formula_moiety         'C20 H30 Al2 I2'
_chemical_formula_sum            'C20 H30 Al2 I2'
_chemical_formula_weight         578.20
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 93.253(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.7521(12)
_cell_length_b                   14.660(2)
_cell_length_c                   18.022(2)
_cell_measurement_reflns_used    7546
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      49.428
_cell_measurement_theta_min      6.898
_cell_volume                     2308.7(5)
_computing_cell_refinement       'Bruker SAINT v7.07'
_computing_data_collection       'Bruker SMART v5.054d'
_computing_data_reduction        'Bruker SAINT v7.07'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'SMART 1000'
_diffrn_measurement_method       '\w scans'
_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  0.0202
_diffrn_reflns_av_sigmaI/netI    0.0166
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            10124
_diffrn_reflns_theta_full        24.72
_diffrn_reflns_theta_max         24.72
_diffrn_reflns_theta_min         3.45
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.801
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.79
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Blessing, 1995'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.664
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1128
_exptl_crystal_size_max          0.51
_exptl_crystal_size_mid          0.47
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.746
_refine_diff_density_min         -0.944
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         3886
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0231
_refine_ls_R_factor_gt           0.0202
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0309P)^2^+1.3020P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0528
_refine_ls_wR_factor_ref         0.0537
_reflns_number_gt                3509
_reflns_number_total             3886
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b806804f.txt
_cod_data_source_block           sgm1_15m
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7103311