Preparation and Characterization of Lithium Imidoalanate Complexes Li2[(RN)4(AlH2)6] (R = Me or tBu): First Examples of Aluminum-Rich Imidoalanes with an Adamantoid Structure
Christina Y. Tang; Andrew R. Cowley; Anthony J. Downs; Simon Parsons; Inorganic Chemistry 46 (2007) 5439–5446; doi:10.1021/ic7006827

data_4308315
_publ_section_title
;
Preparation and Characterization of Lithium Imidoalanate Complexes
Li2[(RN)4(AlH2)6] (R = Me or tBu): First Examples of Aluminum-Rich
Imidoalanes with an Adamantoid Structure
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5439
_journal_page_last               5446
_journal_paper_doi               10.1021/ic7006827
_journal_volume                  46
_journal_year                    2007
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C18 H48 Al6 N6'
_chemical_formula_sum            'C18 H48 Al6 N6'
_chemical_formula_weight         510.51
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_cell_angle_alpha                92.1463(9)
_cell_angle_beta                 93.8153(9)
_cell_angle_gamma                91.3870(11)
_cell_formula_units_Z            4
_cell_length_a                   10.5708(2)
_cell_length_b                   16.5470(4)
_cell_length_c                   17.0406(4)
_cell_measurement_reflns_used    13103
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      1
_cell_volume                     2970.90(11)
_computing_cell_refinement
; 
KappaCCD software 'DENZO' (Otwinowski & Minor, 1996) 
;
_computing_data_collection
; 
KappaCCD software 'Collect' (Nonius, 2000) 
;
_computing_data_reduction
; 
KappaCCD software 'DENZO' (Otwinowski & Minor, 1996) 
;
_computing_publication_material
; 
CRYSTALS (Watkin et al, 2001) 
;
_computing_structure_refinement
; 
CRYSTALS (Watkin et al, 2001) 
;
_computing_structure_solution    'SIR92 (Giacovazzo et al, 1992)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type
; 
Nonius KappaCCD 
;
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_reflns_av_R_equivalents  0.097
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            23915
_diffrn_reflns_theta_full        27.536
_diffrn_reflns_theta_max         27.536
_diffrn_reflns_theta_min         5.00
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.233
_exptl_absorpt_correction_T_max  0.95
_exptl_absorpt_correction_T_min  0.89
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.141
_exptl_crystal_description       block
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_exptl_crystal_thermal_history
; 
The material was crystallised at ambient temperature. A suitable crystal 
was cooled rapidly to 150K for single-crystal X-ray diffraction analysis. 
;
_refine_diff_density_max         0.31
_refine_diff_density_min         -0.32
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0872
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     589
_refine_ls_number_reflns         6508
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1078
_refine_ls_R_factor_gt           0.0405
_refine_ls_shift/su_max          0.037092
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 0.340 0.148 0.159 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0970
_refine_ls_wR_factor_gt          0.0449
_refine_ls_wR_factor_ref         0.0449
_reflns_limit_h_max              13
_reflns_limit_h_min              -13
_reflns_limit_k_max              21
_reflns_limit_k_min              -21
_reflns_limit_l_max              22
_reflns_limit_l_min              0
_reflns_number_gt                6508
_reflns_number_total             13623
_reflns_threshold_expression     I>3.00u(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_scale          0.15407(19)
_cod_data_source_file            ic7006827_si3.cif
_cod_data_source_block           Al6N6
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4308315