Synthesis and Structures of Aluminum and Magnesium Complexes of Tetraimidophosphates and Trisamidothiophosphates: EPR and DFT Investigations of the Persistent Neutral Radicals {Me2Al[(μ-NR)(μ-NtBu)P(μ-NtBu)2]Li(THF)2}. (R = SiMe3,tBu)
Andrea Armstrong; Tristram Chivers; Heikki M. Tuononen; Masood Parvez; Inorganic Chemistry 44 (2005) 5778–5788; doi:10.1021/ic050689e

data_4309381
_publ_contact_author_address
; Department of Chemistry
  University of Calgary
  Calgary Alberta T2N 1N4
  Canada
;
_publ_contact_author_email       chivers@ucalgary.ca
_publ_contact_author_fax         '001 403 289 9488'
_publ_contact_author_name        'Dr Tristram Chivers'
_publ_contact_author_phone       '001 403 220 5741'
_publ_section_title
;
Synthesis and Structures of Aluminum and Magnesium Complexes of
Tetraimidophosphates and Trisamidothiophosphates: EPR and DFT
Investigations of the Persistent Neutral Radicals
{Me2Al[(\m-NR)(\m-NtBu)P(\m-NtBu)2]Li(THF)2}. (R = SiMe3,tBu)
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5778
_journal_page_last               5788
_journal_paper_doi               10.1021/ic050689e
_journal_volume                  44
_journal_year                    2005
_chemical_formula_sum            'C25 H59 Al Li N4 O2 P Si'
_chemical_formula_weight         540.74
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'manual editing of SHELXL template'
_cell_angle_alpha                90.00
_cell_angle_beta                 91.152(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.222(2)
_cell_length_b                   17.632(4)
_cell_length_c                   18.982(4)
_cell_measurement_reflns_used    14750
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.2
_cell_volume                     3420.5(13)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
' HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Diamond 2.1 (Brandenburg, 2000)'
_computing_publication_material  'Diamond 2.1 (Brandenburg, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'KappaCCD (Nonius, FR540C)'
_diffrn_measurement_method       'CCD rotation images, thick slices'
_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  0.0588
_diffrn_reflns_av_sigmaI/netI    0.0879
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            14750
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.25
_diffrn_standards_decay_%        'no decay'
_exptl_absorpt_coefficient_mu    0.166
_exptl_absorpt_correction_T_max  0.9676
_exptl_absorpt_correction_T_min  0.9613
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.050
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1192
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.563
_refine_diff_density_min         -0.877
_refine_diff_density_rms         0.064
_refine_ls_extinction_coef       0.016(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     394
_refine_ls_number_reflns         7804
_refine_ls_number_restraints     28
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.1644
_refine_ls_R_factor_gt           0.0795
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1302P)^2^+2.0375P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2089
_refine_ls_wR_factor_ref         0.2749
_reflns_number_gt                3772
_reflns_number_total             7804
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic050689esi20050503_114345_2.cif
_cod_data_source_block           Compound9a2THF
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_database_code               4309381