Tunable Spin-Crossover Behavior in Polymethylated Bis(indenyl)chromium(II) Complexes: The Significance of Benzo-Ring Substitution
Meredith, M. Brett; Crisp, Jeffrey A.; Brady, Erik D.; Hanusa, Timothy P.; Yee, Gordon T.; Pink, Maren; Brennessel, William W.; Young, Victor G.; Organometallics 27 (2008) 5464–; doi:10.1021/om800473z

data_4071923
_publ_section_title
;
 Tunable Spin-Crossover Behavior in Polymethylated
 Bis(indenyl)chromium(II) Complexes: The Significance of Benzo-Ring
 Substitution
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              5464
_journal_paper_doi               10.1021/om800473z
_journal_volume                  27
_journal_year                    2008
_chemical_formula_moiety         'C28 H34 Cr'
_chemical_formula_sum            'C28 H34 Cr'
_chemical_formula_weight         422.55
_chemical_name_common            00342
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.000
_cell_angle_beta                 93.237(2)
_cell_angle_gamma                90.000
_cell_formula_units_Z            4
_cell_length_a                   11.101(2)
_cell_length_b                   13.664(2)
_cell_length_c                   14.302(2)
_cell_measurement_reflns_used    3849
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      54.8
_cell_measurement_theta_min      4.7
_cell_volume                     2165.9(6)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'SMART, Bruker'
_computing_data_reduction        'SAINT, Bruker'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'SMART, Platform CCD, Siemens'
_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  0.0887
_diffrn_reflns_av_sigmaI/netI    0.0598
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9424
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    0.540
_exptl_absorpt_correction_T_max  0.9581
_exptl_absorpt_correction_T_min  0.8769
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing (1995)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.658
_refine_diff_density_min         -0.599
_refine_diff_density_rms         0.114
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.129
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2488
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.129
_refine_ls_R_factor_all          0.1044
_refine_ls_R_factor_gt           0.0847
_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^)+(0.0795P)^2^+16.4291P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2238
_refine_ls_wR_factor_ref         0.2341
_reflns_number_gt                1927
_reflns_number_total             2488
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800473z_si_005.cif
_cod_data_source_block           00342
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4071923