Synthesis and structure of large difluoromethylene containing alicycles by ring closing metathesis (RCM).
Skibiński, Maciej; Urbina-Blanco, César A; Slawin, Alexandra M. Z.; Nolan, Steven P.; O'Hagan, David; Organic & biomolecular chemistry 11 (2013) 8209–8213; doi:10.1039/c3ob42062k

data_7153219
_publ_section_title
;
 Synthesis and structure of large difluoromethylene containing alicycles
 by ring closing metathesis (RCM).
;
_journal_issue                   47
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8209
_journal_page_last               8213
_journal_paper_doi               10.1039/c3ob42062k
_journal_volume                  11
_journal_year                    2013
_chemical_formula_moiety         'C20 H36 S4'
_chemical_formula_sum            'C20 H36 S4'
_chemical_formula_weight         404.74
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 92.551(19)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   6.748(5)
_cell_length_b                   17.135(12)
_cell_length_c                   19.118(13)
_cell_measurement_reflns_used    1474
_cell_measurement_temperature    173
_cell_measurement_theta_max      68.25
_cell_measurement_theta_min      41.03
_cell_volume                     2208(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.1 b6'
_computing_data_collection       'CrystalClear-SM Expert 2.1 b6 (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert 2.1 b6'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2002 (Burla, et al., 2003)'
_diffrn_ambient_temperature      173
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.985
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.2113
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            22778
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        67.000
_diffrn_reflns_theta_max         68.431
_diffrn_reflns_theta_min         4.631
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.928
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.217
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             880.00
_exptl_crystal_size_max          0.120
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.400
_refine_diff_density_min         -0.530
_refine_ls_extinction_coef       0.0057(13)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3989
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.1106
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1775P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.3265
_reflns_number_gt                2467
_reflns_number_total             3989
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c3ob42062k.txt
_cod_data_source_block           10b
_cod_database_code               7153219