Borylated cyclobutanes <i>via</i> thermal [2 + 2]-cycloaddition.
Prysiazhniuk, Kateryna; Polishchuk, Oleksandr; Shulha, Stanislav; Gudzikevych, Kyrylo; Datsenko, Oleksandr P.; Kubyshkin, Vladimir; Mykhailiuk, Pavel K.; Chemical science 15 (2024) 3249–3254; doi:10.1039/d3sc06600b

data_1571105
_publ_section_title
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 Borylated cyclobutanes <i>via</i> thermal [2 + 2]-cycloaddition.
;
_journal_issue                   9
_journal_name_full               'Chemical science'
_journal_page_first              3249
_journal_page_last               3254
_journal_paper_doi               10.1039/d3sc06600b
_journal_volume                  15
_journal_year                    2024
_chemical_formula_moiety         'C16 H27 B O3'
_chemical_formula_sum            'C16 H27 B O3'
_chemical_formula_weight         278.18
_chemical_melting_point          326
_chemical_name_systematic
3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)spiro[3.6]decan-1-one
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2022-10-26
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_audit_update_record
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2023-12-04 deposited with the CCDC.	2024-01-18 downloaded from the CCDC.
;
_cell_angle_alpha                102.908(3)
_cell_angle_beta                 102.707(3)
_cell_angle_gamma                103.170(3)
_cell_formula_units_Z            2
_cell_length_a                   6.7371(3)
_cell_length_b                   9.7392(5)
_cell_length_c                   13.4409(6)
_cell_measurement_reflns_used    2984
_cell_measurement_temperature    296.15
_cell_measurement_theta_max      26.14
_cell_measurement_theta_min      2.24
_cell_volume                     802.20(7)
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2016/6 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0373
_diffrn_reflns_av_unetI/netI     0.0366
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            11109
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        24.998
_diffrn_reflns_theta_max         24.998
_diffrn_reflns_theta_min         2.243
_diffrn_source_current           30.0
_diffrn_source_power             1.2
_diffrn_source_voltage           40.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.152
_exptl_crystal_description       block
_exptl_crystal_F_000             304
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.195
_refine_diff_density_min         -0.173
_refine_diff_density_rms         0.033
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     185
_refine_ls_number_reflns         2822
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0580
_refine_ls_R_factor_gt           0.0431
_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^)+(0.0408P)^2^+0.2336P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0975
_refine_ls_wR_factor_ref         0.1055
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2207
_reflns_number_total             2822
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3sc06600b2.cif
_cod_data_source_block           vd49
_cod_database_code               1571105
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.992
_shelx_estimated_absorpt_t_min   0.985
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C3(H3)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C5(H5A,H5B), C6(H6A,H6B), C7(H7A,H7B), C8(H8A,H8B), C9(H9A,H9B),
 C10(H10A,H10B)
2.c Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C16(H16A,H16B,
 H16C)
;
_shelx_res_checksum              39380
_olex2_submission_special_instructions 'No special instructions were received'