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_7153224
_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         'C16 H28 F4'
_chemical_formula_sum            'C16 H28 F4'
_chemical_formula_weight         296.39
_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                 94.714(5)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   15.661(3)
_cell_length_b                   11.1268(16)
_cell_length_c                   9.4295(13)
_cell_measurement_reflns_used    8325
_cell_measurement_temperature    173
_cell_measurement_theta_max      67.67
_cell_measurement_theta_min      4.83
_cell_volume                     1637.6(5)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r2'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r2 (Rigaku, 2009)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r2'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla, et al., 2005)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 29.257
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.964
_diffrn_measurement_device_type  'Rigaku Saturn70'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.0448
_diffrn_reflns_Laue_measured_fraction_full 0.976
_diffrn_reflns_Laue_measured_fraction_max 0.964
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            20043
_diffrn_reflns_point_group_measured_fraction_full 0.976
_diffrn_reflns_point_group_measured_fraction_max 0.964
_diffrn_reflns_theta_full        67.000
_diffrn_reflns_theta_max         67.856
_diffrn_reflns_theta_min         4.881
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.843
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.770
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.202
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             640.00
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.010
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.160
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.217
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     181
_refine_ls_number_reflns         2874
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0505
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0377P)^2^+0.8134P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1249
_reflns_number_gt                2637
_reflns_number_total             2874
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c3ob42062k.txt
_cod_data_source_block           11c
_cod_original_cell_volume        1637.6(4)
_cod_database_code               7153224