Difluorenylsilanes, -germanes, and -stannanes Exhibiting an Unprecedented Parallel Arrangement of the Fluorene Units
Nemes, Gabriela Cretiu; Silaghi-Dumitrescu, Luminita; Silaghi-Dumitrescu, Ioan; Escudié, Jean; Ranaivonjatovo, Henri; Molloy, Kieran C.; Mahon, Mary F.; Zukerman-Schpector, Julio; Organometallics 24 (2005) 1134–; doi:10.1021/om049543y

data_4075785
_publ_section_title
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 Difluorenylsilanes, -germanes, and -stannanes Exhibiting an Unprecedented
 Parallel Arrangement of the Fluorene Units
;
_journal_issue                   6
_journal_name_full               Organometallics
_journal_page_first              1134
_journal_paper_doi               10.1021/om049543y
_journal_volume                  24
_journal_year                    2005
_chemical_formula_sum            'C30 H28 Sn'
_chemical_formula_weight         507.21
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_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                90.00
_cell_angle_beta                 117.517(14)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   22.377(4)
_cell_length_b                   13.344(2)
_cell_length_c                   18.147(4)
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      11.9
_cell_measurement_theta_min      5.09
_cell_volume                     4805.7(17)
_computing_cell_refinement       'Siemens (Bruker) P3-P4/PC'
_computing_data_collection       'Siemens (Bruker) P3-P4/PC'
_computing_data_reduction        'Siemens (Bruker) Xdisk'
_computing_molecular_graphics    'ZORTEP (Zsolnai, 1995)'
_computing_publication_material  PARST95-Nardelli,PLATON-Spek,WinGX-Farrugia
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  Saxi/P3
_diffrn_measurement_method       'Wyckoff omega-scan'
_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  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0259
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3252
_diffrn_reflns_theta_full        22.50
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         2.53
_diffrn_standards_interval_count 100
_diffrn_standards_number         4
_exptl_absorpt_coefficient_mu    1.077
_exptl_absorpt_correction_T_max  0.551
_exptl_absorpt_correction_T_min  0.506
_exptl_absorpt_correction_type   psi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.402
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             2064
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.675
_refine_diff_density_min         -0.333
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         3132
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0408
_refine_ls_R_factor_gt           0.0317
_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^)+(0.0509P)^2^+6.5016P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0795
_refine_ls_wR_factor_ref         0.0857
_reflns_number_gt                2695
_reflns_number_total             3132
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om049543ysi20041215_103715.cif
_cod_data_source_block           4c
_cod_depositor_comments
;
The following automatic conversions were performed:
'__exptl_crystal_description' tag replaced with
'_exptl_crystal_description'.

'__computing_data_collection' tag
replaced with '_computing_data_collection'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 
;
_cod_original_cell_volume        4805.7(16)
_cod_database_code               4075785