Cubane-forming cyclic dienes that exhibit orthogonal reactivities in the solid state.
Li, Changan; Sinnwell, Michael A.; Swenson, Dale C.; MacGillivray, Leonard R.; Chemical communications (Cambridge, England) 57 (2021) 6725–6727; doi:10.1039/d1cc02725e

data_7128451
_publ_section_title
;
 Cubane-forming cyclic dienes that exhibit orthogonal reactivities in the
 solid state.
;
_journal_issue                   55
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              6725
_journal_page_last               6727
_journal_paper_doi               10.1039/d1cc02725e
_journal_volume                  57
_journal_year                    2021
_chemical_formula_moiety         'C14 H16 O4'
_chemical_formula_sum            'C14 H16 O4'
_chemical_formula_weight         248.27
_chemical_name_common            'tetramethyl cage'
_chemical_name_systematic
'2,4,8,10-tetramethyl-3,9-dioxapentacyclo [6.4.0.0^2,7.0^4,11.0^5,10]dodecane-6,12-dione '
_space_group_crystal_system      orthorhombic
_space_group_IT_number           64
_space_group_name_Hall           '-C 2ac 2'
_space_group_name_H-M_alt        'C m c e'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2020-10-16
_audit_creation_method
;
Olex2 1.3
(compiled 2020.07.31 svn.rc2a77460 for OlexSys, GUI svn.r6145)
;
_audit_update_record
;
2021-05-08 deposited with the CCDC.	2021-06-07 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.4105(12)
_cell_length_b                   7.2547(7)
_cell_length_c                   13.7901(14)
_cell_measurement_reflns_used    1652
_cell_measurement_temperature    298.15
_cell_measurement_theta_max      25.35
_cell_measurement_theta_min      1.00
_cell_volume                     1241.6(2)
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      298.15
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker Nonius APEX II Kappa'
_diffrn_measurement_method       'CCD phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0659
_diffrn_reflns_av_unetI/netI     0.0315
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            3393
_diffrn_reflns_point_group_measured_fraction_full 0.990
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.348
_diffrn_reflns_theta_max         25.348
_diffrn_reflns_theta_min         4.396
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.9874
_exptl_absorpt_correction_T_min  0.7913
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_description       prism
_exptl_crystal_F_000             528
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.190
_refine_diff_density_min         -0.124
_refine_diff_density_rms         0.032
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     49
_refine_ls_number_reflns         598
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0527
_refine_ls_R_factor_gt           0.0439
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0574P)^2^+0.6082P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1102
_refine_ls_wR_factor_ref         0.1167
_reflns_Friedel_coverage         0.000
_reflns_number_gt                507
_reflns_number_total             598
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc02725e2.cif
_cod_data_source_block           mcg1748a
_cod_depositor_comments
'Adding full bibliography for 7128449--7128452.cif.'
_cod_original_sg_symbol_Hall     '-C 2bc 2'
_cod_original_sg_symbol_H-M      'C m c a'
_cod_database_code               7128451
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.990
_shelx_estimated_absorpt_t_min   0.968
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C3(H3), C5(H5)
2.b Idealised Me refined as rotating group:
 C6(H6a,H6b,H6c)
;
_shelx_res_checksum              94122
_olex2_submission_special_instructions 'No special instructions were received'