Main Group Multiple C-H/N-H Bond Activation of a Diamine and Isolation of A Molecular Dilithium Zincate Hydride: Experimental and DFT Evidence for Alkali Metal-Zinc Synergistic Effects
Ross Campbell; Daniel Cannon; Pablo García-Álvarez; Alan R. Kennedy; Robert E. Mulvey; Stuart D. Robertson; Jörg Saßmannshausen; Tell Tuttle; Journal of the American Chemical Society 133 (2011) 13706–13717; doi:10.1021/ja205547h

data_4106679
_publ_section_title
;
 Main Group Multiple C-H/N-H Bond Activation of a Diamine and Isolation of
 A Molecular Dilithium Zincate Hydride: Experimental and DFT Evidence for
 Alkali Metal-Zinc Synergistic Effects
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13706
_journal_page_last               13717
_journal_paper_doi               10.1021/ja205547h
_journal_volume                  133
_journal_year                    2011
_chemical_formula_sum            'C38.25 H91.25 N8 Na2 Zn2'
_chemical_formula_weight         840.16
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.665(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.0362(12)
_cell_length_b                   19.0750(14)
_cell_length_c                   18.1701(14)
_cell_measurement_reflns_used    4033
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      73.13
_cell_measurement_theta_min      3.92
_cell_volume                     4854.9(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0534
_diffrn_reflns_av_sigmaI/netI    0.1352
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            20032
_diffrn_reflns_theta_full        70.00
_diffrn_reflns_theta_max         70.00
_diffrn_reflns_theta_min         3.92
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.627
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.95334
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.34d (release 27-02-2009 CrysAlis171 .NET)
(compiled Feb 27 2009,15:38:38)
empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.149
_exptl_crystal_description       chip
_exptl_crystal_F_000             1835
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.761
_refine_diff_density_min         -0.369
_refine_diff_density_rms         0.085
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.944
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     480
_refine_ls_number_reflns         9140
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      0.945
_refine_ls_R_factor_all          0.1111
_refine_ls_R_factor_gt           0.0605
_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^)+(0.0594P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1422
_refine_ls_wR_factor_ref         0.1515
_reflns_number_gt                4893
_reflns_number_total             9140
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja205547h_si_002_6.cif
_cod_data_source_block           pgapga21
_cod_database_code               4106679