Structural and theoretical investigation of 2-iminoimidazolines–carbene analogues of iminophosphoranes.
Tamm, Matthias; Petrovic, Dejan; Randoll, Sören; Beer, Stephan; Bannenberg, Thomas; Jones, Peter G.; Grunenberg, Jörg; Organic & biomolecular chemistry 5 (2007) 523–530; doi:10.1039/b615418b

data_7151052
_publ_section_title
;
 Structural and theoretical investigation of
 2-iminoimidazolines--carbene analogues of iminophosphoranes.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              523
_journal_page_last               530
_journal_paper_doi               10.1039/b615418b
_journal_volume                  5
_journal_year                    2007
_chemical_formula_moiety         'C24 H33 N3 Si'
_chemical_formula_sum            'C24 H33 N3 Si'
_chemical_formula_weight         391.62
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                88.5376(6)
_cell_angle_beta                 80.8585(6)
_cell_angle_gamma                83.8057(6)
_cell_formula_units_Z            2
_cell_length_a                   8.47290(10)
_cell_length_b                   8.93460(10)
_cell_length_c                   15.8498(3)
_cell_measurement_reflns_used    4222
_cell_measurement_temperature    173
_cell_measurement_theta_max      25.34
_cell_measurement_theta_min      1.30
_cell_volume                     1177.66(3)
_computing_cell_refinement       'DENZO (Nonius, 2001b)'
_computing_data_collection       'Kappa-CCD Control Software (Nonius, 2001a)'
_computing_data_reduction        'DENZO (Nonius, 2001b)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1998)'
_computing_structure_solution    'SIR92 (Altomare, 1994)'
_diffrn_ambient_temperature      173
_diffrn_detector                 ' CCD plate '
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       ' \k-geometry diffractometer '
_diffrn_measurement_device_type  ' Nonius \k-CCD diffractometer'
_diffrn_measurement_method       ' phi- and omega-rotation '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'NONIUS FR 591 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0162
_diffrn_reflns_av_sigmaI/netI    0.0224
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8419
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         1.30
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_T_max  0.961
_exptl_absorpt_correction_T_min  0.956
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.104
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       fragment
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_exptl_crystal_size_max          0.400
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_exptl_crystal_size_min          0.350
_refine_diff_density_max         0.241
_refine_diff_density_min         -0.300
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_refine_ls_extinction_method     none
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     385
_refine_ls_number_reflns         4282
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0426
_refine_ls_R_factor_gt           0.0374
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(Fo^2^)+(0.0534P)^2^+0.4222P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.1003
_refine_ls_wR_factor_ref         0.1039
_reflns_number_gt                3809
_reflns_number_total             4282
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b615418b.txt
_cod_data_source_block           sran1
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
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_cod_database_code               7151052