Chelate Effect in the Gas Phase. The Complexes of Ni(2,2,6,6-tetramethyl-3,5-heptanedionate)2 with Bidentate Ligands
Franzpeter Emmenegger; Carl Wilhelm Schlaepfer; Helen Stoeckli-Evans; Michel Piccand; Henryk Piekarski; Inorganic Chemistry 40 (2001) 3884–3888; doi:10.1021/ic0014540

data_4320014
_publ_section_title
;
 Chelate Effect in the Gas Phase. The Complexes of
 Ni(2,2,6,6-tetramethyl-3,5-heptanedionate)2 with Bidentate Ligands
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3884
_journal_page_last               3888
_journal_paper_doi               10.1021/ic0014540
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C28 H54 N2 Ni O4'
_chemical_formula_weight         541.44
_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                 92.964(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0160(8)
_cell_length_b                   18.9271(12)
_cell_length_c                   17.1938(16)
_cell_measurement_reflns_used    5000
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      25.91
_cell_measurement_theta_min      2.15
_cell_volume                     3255.1(5)
_computing_cell_refinement       'CELL (Stoe & Cie GmbH, Darmstadt, 1997) '
_computing_data_collection       'EXPOSE (Stoe & Cie GmbH, Darmstadt, 1997)'
_computing_data_reduction        'INTEGRATE (Stoe & Cie GmbH, Darmstadt, 1997)'
_computing_molecular_graphics    'PLATON/PLUTON (Spek, 1990)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_detector_area_resol_mean 0.81\%A
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'STOE Image Plate Diffraction System'
_diffrn_measurement_method       'phi rotation 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  0.0320
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            25148
_diffrn_reflns_theta_full        25.91
_diffrn_reflns_theta_max         25.91
_diffrn_reflns_theta_min         2.15
_exptl_absorpt_coefficient_mu    0.626
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'pale blue'
_exptl_crystal_density_diffrn    1.105
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.638
_refine_diff_density_min         -0.514
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     316
_refine_ls_number_reflns         6282
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0619
_refine_ls_R_factor_gt           0.0482
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0921P)^2^+0.8894P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1352
_refine_ls_wR_factor_ref         0.1430
_reflns_number_gt                4897
_reflns_number_total             6282
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0014540_1.cif
_cod_data_source_block           TEME
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0921P)^2^+0.8894P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0921P)^2^+0.8894P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        3255.1(4)
_cod_database_code               4320014