Synthesis and structure of early transition metal NHC complexes
Lorber, Christian; Vendier, Laure; Dalton Transactions  (2009) 6972–; doi:10.1039/b905056f

data_7001938
_publ_section_title
;
 Synthesis and structure of early transition metal NHC complexes
;
_journal_issue                   35
_journal_name_full               'Dalton Transactions'
_journal_page_first              6972
_journal_paper_doi               10.1039/b905056f
_journal_year                    2009
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C21 H25 N2, C4 H6 Cl4 N2 V'
_chemical_formula_sum            'C25 H31 Cl4 N4 V'
_chemical_formula_weight         580.28
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                63.734(16)
_cell_angle_beta                 79.869(13)
_cell_angle_gamma                81.140(15)
_cell_formula_units_Z            2
_cell_length_a                   8.5259(15)
_cell_length_b                   13.090(3)
_cell_length_c                   14.3003(19)
_cell_measurement_reflns_used    3002
_cell_measurement_temperature    180
_cell_measurement_theta_max      28.9991
_cell_measurement_theta_min      2.7339
_cell_measurement_wavelength     0.71073
_cell_volume                     1403.6(5)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd.'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd.'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd.'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Giacovazzo et al, 1993)'
_diffrn_ambient_temperature      180
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Oxford-Diffraction XCALIBUR'
_diffrn_measurement_method       \w-\f
_diffrn_orient_matrix_UB_11      -0.0706821102
_diffrn_orient_matrix_UB_12      0.0258892053
_diffrn_orient_matrix_UB_13      0.0177610462
_diffrn_orient_matrix_UB_21      -0.04497794
_diffrn_orient_matrix_UB_22      -0.0413364789
_diffrn_orient_matrix_UB_23      0.0000088197
_diffrn_orient_matrix_UB_31      0.013009807
_diffrn_orient_matrix_UB_32      -0.0360500241
_diffrn_orient_matrix_UB_33      0.0528008455
_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  0.0691
_diffrn_reflns_av_unetI/netI     0.1946
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10991
_diffrn_reflns_theta_full        26.31
_diffrn_reflns_theta_max         26.31
_diffrn_reflns_theta_min         2.74
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.755
_exptl_absorpt_correction_T_max  0.978
_exptl_absorpt_correction_T_min  0.8617
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.5 (release 28-08-2006 CrysAlis171 .NET)
(compiled Aug 28 2006,13:05:05)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             600
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.358
_refine_diff_density_min         -0.409
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.824
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     318
_refine_ls_number_reflns         5722
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.824
_refine_ls_R_factor_all          0.1308
_refine_ls_R_factor_gt           0.043
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0298P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0713
_refine_ls_wR_factor_ref         0.0893
_reflns_number_gt                2545
_reflns_number_total             5722
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            b905056f.txt
_cod_data_source_block           '[VCl4(CH3CN)2]2[HIMes]'
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               7001938