Synthesis and characterisation of an N-heterocyclic carbene with spatially-defined steric impact.
Shaw, Paul; Kennedy, Alan R.; Nelson, David J.; Dalton transactions (Cambridge, England : 2003) 45 (2016) 11772–11780; doi:10.1039/c6dt02100j

data_7039573
_publ_section_title
;
 Synthesis and characterisation of an N-heterocyclic carbene with
 spatially-defined steric impact.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11772
_journal_page_last               11780
_journal_paper_doi               10.1039/c6dt02100j
_journal_volume                  45
_journal_year                    2016
_chemical_formula_sum            'C52 H49 Cl5 N2 Ni'
_chemical_formula_weight         937.89
_chemical_name_systematic
;
 ?
;
_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
_audit_update_record
;
2016-05-25 deposited with the CCDC.
2016-06-16 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 102.643(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.8315(4)
_cell_length_b                   24.7675(6)
_cell_length_c                   17.4157(5)
_cell_measurement_reflns_used    4443
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.8670
_cell_measurement_theta_min      3.1660
_cell_volume                     4558.8(2)
_computing_cell_refinement       CrysalisPro
_computing_data_collection       CrysalisPro
_computing_data_reduction        CrysalisPro
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SIR92
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       '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  0.0526
_diffrn_reflns_av_sigmaI/netI    0.0796
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            20995
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         2.98
_exptl_absorpt_coefficient_mu    0.757
_exptl_absorpt_correction_T_max  0.931
_exptl_absorpt_correction_T_min  0.743
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
Analytical numeric absorption correction using a multifaceted crystal
            model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.367
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'cut fragment'
_exptl_crystal_F_000             1952
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.058
_refine_diff_density_min         -0.591
_refine_diff_density_rms         0.089
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     555
_refine_ls_number_reflns         10611
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.1008
_refine_ls_R_factor_gt           0.0652
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0862P)^2^+0.5459P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1560
_refine_ls_wR_factor_ref         0.1854
_reflns_number_gt                7115
_reflns_number_total             10611
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c6dt02100j2.cif
_cod_data_source_block           nelson_nipaul
_cod_depositor_comments
'Adding full bibliography for 7039571--7039574.cif.'
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7039573