NHC adducts of tantalum amidohalides: the first example of NHC abnormally coordinated to an early transition metal.
Petrov, Pavel A.; Sukhikh, Taisiya S.; Sokolov, Maxim N.; Dalton transactions (Cambridge, England : 2003) 46 (2017) 4902–4906; doi:10.1039/c7dt00748e

data_7042383
_publ_section_title
;
 NHC adducts of tantalum amidohalides: the first example of NHC abnormally
 coordinated to an early transition metal.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4902
_journal_page_last               4906
_journal_paper_doi               10.1039/c7dt00748e
_journal_volume                  46
_journal_year                    2017
_chemical_formula_moiety         'C25 H38 F3 N4 Ta'
_chemical_formula_sum            'C25 H38 F3 N4 Ta'
_chemical_formula_weight         632.54
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2017-01-21
_audit_creation_method
;
Olex2 1.2
(compiled 2017.01.04 svn.r3372 for OlexSys, GUI svn.r5289)
;
_audit_update_record
;
2017-02-02 deposited with the CCDC.
2017-03-07 downloaded from the CCDC.
;
_cell_angle_alpha                81.404(2)
_cell_angle_beta                 84.287(2)
_cell_angle_gamma                71.383(2)
_cell_formula_units_Z            2
_cell_length_a                   8.8138(6)
_cell_length_b                   9.5873(7)
_cell_length_c                   16.5828(11)
_cell_measurement_reflns_used    9850
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.78
_cell_measurement_theta_min      2.26
_cell_volume                     1311.01(16)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      150.15
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0284
_diffrn_reflns_av_unetI/netI     0.0227
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            19316
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.500
_diffrn_reflns_theta_max         25.779
_diffrn_reflns_theta_min         2.259
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.232
_exptl_absorpt_correction_T_max  0.7453
_exptl_absorpt_correction_T_min  0.4064
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2012/1 (Bruker,2012) was used for absorption correction. wR2(int) was 0.1182 before and 0.0388 after correction. The Ratio of minimum to maximum transmission is 0.5453. The \l/2 correction factor is 0.0015.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.602
_exptl_crystal_description       plate
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.451
_refine_diff_density_min         -0.592
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         5011
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0149
_refine_ls_R_factor_gt           0.0144
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0148P)^2^+0.6618P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0365
_refine_ls_wR_factor_ref         0.0368
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4900
_reflns_number_total             5011
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt00748e2.cif
_cod_data_source_block           1b
_cod_depositor_comments
'Adding full bibliography for 7042380--7042383.cif.'
_cod_database_code               7042383
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.728
_shelx_estimated_absorpt_t_min   0.252
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C3(H3A,H3B)
2.b Aromatic/amide H refined with riding coordinates:
 C6(H6), C8(H8), C15(H15), C17(H17)
2.c Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C19(H19A,H19B,
 H19C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C41(H41A,H41B,H41C), C42(H42A,
 H42B,H42C), C31(H31A,H31B,H31C), C32(H32A,H32B,H32C)
;
_olex2_submission_special_instructions 'No special instructions were received'