Spectroscopic and Structural Assignment of the Absolute Stereochemistry in a Series of 1,2-Difluorovinyl Organometalloids. The First Crystallographic Characterization and Structural Series of Group 14 Fluorovinyl Compounds
Alan K. Brisdon; Ian R. Crossley; Robin G. Pritchard; John E. Warren; Inorganic Chemistry 41 (2002) 4748–4755; doi:10.1021/ic025593o

data_4318458
_publ_section_title
;
 Spectroscopic and Structural Assignment of the Absolute Stereochemistry
 in a Series of 1,2-Difluorovinyl Organometalloids. The First
 Crystallographic Characterization and Structural Series of Group 14
 Fluorovinyl Compounds
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4748
_journal_page_last               4755
_journal_paper_doi               10.1021/ic025593o
_journal_volume                  41
_journal_year                    2002
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C26 H20 F2 Ge1'
_chemical_formula_structural     'C26 H20 F2 GE1'
_chemical_formula_sum            'C26 H20 F2 Ge'
_chemical_formula_weight         443.01
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_date             2001-11-19T23:46:53-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 99.400(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.5395(3)
_cell_length_b                   11.4621(6)
_cell_length_c                   12.2168(6)
_cell_measurement_reflns_used    31649
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      0.998
_cell_measurement_wavelength     0.71073
_cell_volume                     1041.58(9)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.99
_diffrn_measured_fraction_theta_max 0.99
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_orient_matrix_type       'by Nonius Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      0.141125E-1
_diffrn_orient_matrix_UB_12      0.570729E-1
_diffrn_orient_matrix_UB_13      -0.598884E-1
_diffrn_orient_matrix_UB_21      0.115602
_diffrn_orient_matrix_UB_22      0.278017E-1
_diffrn_orient_matrix_UB_23      0.442976E-1
_diffrn_orient_matrix_UB_31      0.671646E-1
_diffrn_orient_matrix_UB_32      -0.598438E-1
_diffrn_orient_matrix_UB_33      -0.365361E-1
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0206
_diffrn_reflns_av_unetI/netI     0.0386
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7146
_diffrn_reflns_reduction_process
;
 Scaled and merged with SORTAV
 R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
 R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        27.43
_diffrn_reflns_theta_max         27.43
_diffrn_reflns_theta_min         3.82
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    1.497
_exptl_absorpt_correction_T_max  0.74
_exptl_absorpt_correction_T_min  0.64
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 R.H. Blessing, Acta Cryst. (1995), A51, 33-38
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.413
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.602
_refine_diff_density_min         -0.432
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.023(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     342
_refine_ls_number_reflns         4543
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0319
_refine_ls_R_factor_gt           0.0284
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0118P)^2^+0.5245P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0635
_refine_ls_wR_factor_ref         0.0656
_reflns_number_gt                4272
_reflns_number_total             4543
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic025593o_s1_6.cif
_cod_data_source_block           ph3gecfcfph
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4318458