Targeted construction of azido-bridged Ni4 complexes with decisive effect of mu-1,3-azide torsion on the spin ground state.
Demeshko, Serhiy; Leibeling, Guido; Dechert, Sebastian; Meyer, Franc; Dalton transactions (Cambridge, England : 2003)  (2006) 3458–3465; doi:10.1039/b517254c

data_7007082
_publ_section_title
;
 Targeted construction of azido-bridged Ni4 complexes with decisive
 effect of mu-1,3-azide torsion on the spin ground state.
;
_journal_issue                   28
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3458
_journal_page_last               3465
_journal_paper_doi               10.1039/b517254c
_journal_year                    2006
_chemical_formula_moiety         'C17 H35 N11 Ni2 O6, C4 H10 O'
_chemical_formula_sum            'C21 H45 N11 Ni2 O7'
_chemical_formula_weight         681.10
_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                 97.861(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.1582(4)
_cell_length_b                   16.9656(11)
_cell_length_c                   22.3370(12)
_cell_measurement_reflns_used    20094
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      24.74
_cell_measurement_theta_min      1.84
_cell_volume                     3062.6(3)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2002)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-AREA (Stoe & Cie, 2002)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2001)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Stoe IPDS II'
_diffrn_measurement_method       \w
_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  0.0352
_diffrn_reflns_av_sigmaI/netI    0.0286
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            20094
_diffrn_reflns_theta_full        24.74
_diffrn_reflns_theta_max         24.74
_diffrn_reflns_theta_min         1.84
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.287
_exptl_absorpt_correction_T_max  0.7540
_exptl_absorpt_correction_T_min  0.6608
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'X-RED (Stoe & Cie, 2002)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.477
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1440
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.667
_refine_diff_density_min         -0.503
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     372
_refine_ls_number_reflns         5203
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0427
_refine_ls_R_factor_gt           0.0317
_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^)+(0.0476P)^2^+1.0866P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0778
_refine_ls_wR_factor_ref         0.0813
_reflns_number_gt                4306
_reflns_number_total             5203
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b517254c.txt
_cod_data_source_block           3
_cod_database_code               7007082