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_4081735
_publ_section_title
;
 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         'C17 H27 Cl3 N3 Ta'
_chemical_formula_sum            'C17 H27 Cl3 N3 Ta'
_chemical_formula_weight         560.71
_chemical_name_systematic
; 
 ? 
;
_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                 98.529(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   29.858(3)
_cell_length_b                   8.7229(10)
_cell_length_c                   30.672(4)
_cell_measurement_reflns_used    17849
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.9
_cell_measurement_theta_min      1.0
_cell_volume                     7900.1(16)
_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      150(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0412
_diffrn_reflns_av_sigmaI/netI    0.0330
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -38
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            78096
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.09
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.976
_exptl_absorpt_correction_T_max  0.5864
_exptl_absorpt_correction_T_min  0.4482
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.886
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             4384
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.945
_refine_diff_density_min         -1.817
_refine_diff_density_rms         0.159
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     459
_refine_ls_number_reflns         9077
_refine_ls_number_restraints     41
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0285
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0202P)^2^+44.7790P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0574
_refine_ls_wR_factor_ref         0.0623
_reflns_number_gt                7472
_reflns_number_total             9077
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om400364m_si_001.cif
_cod_data_source_block           mes10-9
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 

2026-05-15
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'C34 H54 Cl6 N6 Ta2'
_cod_original_formula_weight         1121.43
_cod_original_formula_moiety         '2(C17 H27 Cl3 N3 Ta1)'
_cod_original_formula_units_Z            8
_cod_original_sg_symbol_Hall     '-C 2yc '
_cod_original_sg_symbol_H-M      'C 2/c '
_cod_database_code               4081735