Lithium and aluminium carbamato derivatives of the utility amide 2,2,6,6-tetramethylpiperidide.
Kennedy, Alan R.; Mulvey, Robert E.; Oliver, David E.; Robertson, Stuart D.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 6190–6197; doi:10.1039/c0dt00118j

data_7026004
_publ_section_title
;
 Lithium and aluminium carbamato derivatives of the utility amide
 2,2,6,6-tetramethylpiperidide.
;
_journal_issue                   27
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6190
_journal_page_last               6197
_journal_paper_doi               10.1039/c0dt00118j
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C36 H72 Al2 N2 O4'
_chemical_formula_sum            'C36 H72 Al2 N2 O4'
_chemical_formula_weight         650.92
_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                 99.805(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.2755(3)
_cell_length_b                   15.4153(5)
_cell_length_c                   13.9819(4)
_cell_measurement_reflns_used    15780
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      29.0709
_cell_measurement_theta_min      2.7829
_cell_volume                     1969.99(11)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'Xcalibur, Sapphire3, Gemini'
_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  0.0349
_diffrn_reflns_av_sigmaI/netI    0.0330
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            34265
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         29.13
_diffrn_reflns_theta_min         2.79
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97951
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.097
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.419
_refine_diff_density_min         -0.407
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     215
_refine_ls_number_reflns         4924
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0624
_refine_ls_R_factor_gt           0.0435
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0714P)^2^+0.4478P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1238
_refine_ls_wR_factor_ref         0.1300
_reflns_number_gt                3719
_reflns_number_total             4924
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00118j.txt
_cod_data_source_block           5
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7026004