High- and Mid-Valent Tantalum and Mono(peralkylcyclopentadienyl)tantalum Complexes of the Bicyclic Guanidinate Hexahydropyrimidopyrimidinate
Mohammad, Adil; Olson, Justine R.; Rotsch, David A.; Bemowski, Ross D.; Swenson, Dale C.; Messerle, Louis; Organometallics 32 (2013) 6232–; doi:10.1021/om400364m

data_4081738
_publ_section_title
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 High- and Mid-Valent Tantalum and Mono(peralkylcyclopentadienyl)tantalum
 Complexes of the Bicyclic Guanidinate Hexahydropyrimidopyrimidinate
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              6232
_journal_paper_doi               10.1021/om400364m
_journal_volume                  32
_journal_year                    2013
_chemical_formula_moiety         'C14 H24 Cl3 N6 Ta'
_chemical_formula_sum            'C14 H24 Cl3 N6 Ta'
_chemical_formula_weight         563.69
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.1922(11)
_cell_length_b                   14.6406(15)
_cell_length_c                   25.205(3)
_cell_measurement_reflns_used    16437
_cell_measurement_temperature    190(2)
_cell_measurement_theta_max      27.9
_cell_measurement_theta_min      1.0
_cell_volume                     3761.1(7)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo, Scalepack (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'SHELXTL v6.1  (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL v6.1  (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL v6.1  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL v6.1  (Sheldrick, 2008)'
_diffrn_ambient_temperature      190(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       'CCD phi and omega 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  0.0583
_diffrn_reflns_av_sigmaI/netI    0.0328
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            77376
_diffrn_reflns_theta_full        27.90
_diffrn_reflns_theta_max         27.90
_diffrn_reflns_theta_min         3.22
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.281
_exptl_absorpt_correction_T_max  0.7442
_exptl_absorpt_correction_T_min  0.5195
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'orange yellow'
_exptl_crystal_density_diffrn    1.991
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2192
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.05
_refine_diff_density_max         2.021
_refine_diff_density_min         -1.063
_refine_diff_density_rms         0.160
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     233
_refine_ls_number_reflns         4477
_refine_ls_number_restraints     47
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0544
_refine_ls_R_factor_gt           0.0283
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0243P)^2^+4.8842P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0554
_refine_ls_wR_factor_ref         0.0626
_reflns_number_gt                3202
_reflns_number_total             4477
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om400364m_si_001.cif
_cod_data_source_block           mes10-21
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_Hall     '-P 2ac 2ab '
_cod_database_code               4081738