<i>catena</i>-Poly[[(tetrahydrofuran-κ<i>O</i>)potassium]-di-μ-dimethylamido-κ^4^<i>N</i>:<i>N</i>-aluminium-di-μ-dimethylamido-κ^4^<i>N</i>:<i>N</i>-potassium-di-μ-dimethylamido-κ^4^<i>N</i>:<i>N</i>-aluminium-di-μ-dimethylamido-κ^4^<i>N</i>:<i>N</i>]
Purdy, Andrew; Parrish, Damon; Acta Crystallographica Section E 69 (2013) m147–; doi:10.1107/S1600536813003553

data_2237536
_publ_section_title
;
 <i>catena</i>-Poly[[(tetrahydrofuran-\k<i>O</i>)potassium]-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-aluminium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-potassium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-aluminium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>]
;
_journal_coeditor_code           NK2195
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m147
_journal_paper_doi               10.1107/S1600536813003553
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          '[Al2 K2 (C2 H6 N1)8 (C4 H8 O1)]'
_chemical_formula_moiety         'C20 H56 Al2 K2 N8 O1'
_chemical_formula_sum            'C20 H56 Al2 K2 N8 O'
_chemical_formula_weight         556.88
_chemical_name_systematic
<i>catena</i>-Poly[[(tetrahydrofuran-\k<i>O</i>)potassium]-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-aluminium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-potassium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>-aluminium-di-\m-dimethylamido-\k^4^<i>N</i>:<i>N</i>]
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 90.979(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.247(4)
_cell_length_b                   12.075(4)
_cell_length_c                   20.822(7)
_cell_measurement_reflns_used    6485
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      30.16
_cell_measurement_theta_min      2.28
_cell_volume                     3330.1(19)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction
;
SAINT (Bruker, 2008)
;
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.939
_diffrn_measured_fraction_theta_max 0.939
_diffrn_measurement_device_type  'Bruker SMART APEXII CCD'
_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  0.0228
_diffrn_reflns_av_sigmaI/netI    0.0218
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            18795
_diffrn_reflns_theta_full        30.90
_diffrn_reflns_theta_max         30.90
_diffrn_reflns_theta_min         1.96
_exptl_absorpt_coefficient_mu    0.362
_exptl_absorpt_correction_T_max  0.8629
_exptl_absorpt_correction_T_min  0.7756
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.111
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.74
_exptl_crystal_size_mid          0.57
_exptl_crystal_size_min          0.42
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.298
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         4928
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0475
_refine_ls_R_factor_gt           0.0361
_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^)+(0.0567P)^2^+0.9926P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1005
_refine_ls_wR_factor_ref         0.1068
_reflns_number_gt                3986
_reflns_number_total             4928
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            nk2195.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_original_formula_sum        'C20 H56 Al2 K2 N8 O1'
_cod_database_code               2237536
_cod_database_fobs_code          2237536