1,3-Bis(N,N-dialkylamino)imidazolin-2-ylidenes: Synthesis and Reactivity of a New Family of Stable N-Heterocyclic Carbenes
Manuel Alcarazo; Stephen J. Roseblade; Emma Alonso; Rosario Fernández; Eleuterio Alvarez; Fernando J. Lahoz; José M. Lassaletta; Journal of the American Chemical Society 126 (2004) 13242–13243; doi:10.1021/ja0471119

data_4113061
_publ_contact_author_address
;
  Dr. Jose M. Lassaletta
 Instituto de Investigaciones Quimicas, C.S.I.C-Universidad de Sevilla,
 Avd. Americo Vespucio, s/n., Isla de la Cartuja, 41092 Sevilla,  Spain
;
_publ_contact_author_email       jmlassa@iiq.csic.es
_publ_contact_author_fax         '+34 954 460565'
_publ_contact_author_name        'Dr. Jose M. Lassaletta'
_publ_contact_author_phone       '+34 954 489560'
_publ_section_title
;
 1,3-Bis(N,N-dialkylamino)imidazolin-2-ylidenes: Synthesis and Reactivity
 of a New Family of Stable N-Heterocyclic Carbenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13242
_journal_page_last               13243
_journal_paper_doi               10.1021/ja0471119
_journal_volume                  126
_journal_year                    2004
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C35 H48 Cl N4 O2 Rh'
_chemical_formula_sum            'C35 H48 Cl N4 O2 Rh'
_chemical_formula_weight         695.13
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 92.743(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.7983(10)
_cell_length_b                   9.4257(10)
_cell_length_c                   17.9186(19)
_cell_measurement_reflns_used    6268
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      29.97
_cell_measurement_theta_min      2.42
_cell_volume                     1653.0(3)
_computing_cell_refinement       'SAINT+ v. 6.22 (Bruker AXS, 2001)'
_computing_data_collection       'SMART v. 5.625 (Bruker AXS, 2001)'
_computing_data_reduction        'SAINT+ v. 6.22 (Bruker AXS, 2001)'
_computing_molecular_graphics    'XP, SHELXTL v. 6.10 (Bruker, 2000)'
_computing_publication_material  'XCIF, SHELXTL v. 6.10 (Bruker, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.905
_diffrn_measurement_device_type  'Bruker SMART APEX CCD system'
_diffrn_measurement_method       '\w rotations with narrow frames'
_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  0.0189
_diffrn_reflns_av_sigmaI/netI    0.0320
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10235
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.11
_diffrn_reflns_theta_min         2.08
_diffrn_standards_number         'no decay'
_exptl_absorpt_coefficient_mu    0.634
_exptl_absorpt_correction_T_max  0.8474
_exptl_absorpt_correction_T_min  0.6114
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; SADABS: Area-Detector Absorption Correction. Bruker-AXS 
  within SAINT+ package, v. 6.22 (2001).
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.397
_exptl_crystal_description       prism
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.86
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.638
_refine_diff_density_min         -0.486
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     388
_refine_ls_number_reflns         5764
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0322
_refine_ls_R_factor_gt           0.0297
_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^)+(0.0326P)^2^+0.9102P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0707
_refine_ls_wR_factor_ref         0.0725
_reflns_number_gt                5444
_reflns_number_total             5764
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0471119si20040908_102737_1.cif
_cod_data_source_block           13
_cod_database_code               4113061