Selective Synthesis of Cyclic Peroxides from Triketones and H2O2
Alexander O. Terent'ev; Ivan A. Yaremenko; Vladimir V. Chernyshev; Valery M. Dembitsky; Gennady I. Nikishin; Journal of Organic Chemistry 77 (2012) 1833–1842; doi:10.1021/jo202437r

data_4026972
_publ_contact_author             V.V.Chernyshev
_publ_contact_author_address
;
      Department of Chemistry 
      Moscow State University
      119991 Moscow
      Russia
;
_publ_contact_author_email       vladimir@struct.chem.msu.ru
_publ_contact_author_fax         '+ 7-495-9390898'
_publ_contact_author_name        'Dr. Vladimir V. Chernyshev'
_publ_contact_author_phone       '+ 7-495-9393654'
_publ_section_title
;
 Selective Synthesis of Cyclic Peroxides from Triketones and H2O2
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1833
_journal_page_last               1842
_journal_paper_doi               10.1021/jo202437r
_journal_volume                  77
_journal_year                    2012
_chemical_formula_moiety         'C10 H16 O4'
_chemical_formula_sum            'C10 H16 O4'
_chemical_formula_weight         200.23
_chemical_name_systematic
; 
3,3a,6,7a-Tetramethyltetrahydro-3H,4H-3,6-epoxy[1,2]dioxolo[3,4-b]pyran 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   10.477(2)
_cell_length_b                   15.0190(18)
_cell_length_c                   13.2317(14)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      33.19
_cell_measurement_theta_min      30.40
_cell_volume                     2082.1(5)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector                 'scintillation LiI'
_diffrn_detector_dtime           1.195
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       'non-profiled omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.034
_diffrn_reflns_av_sigmaI/netI    0.0222
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       0
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            2243
_diffrn_reflns_theta_full        72.00
_diffrn_reflns_theta_max         72.00
_diffrn_reflns_theta_min         5.89
_diffrn_source                   'Enraf Nonius FR590'
_diffrn_standards_decay_%        2
_diffrn_standards_interval_time  120
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.817
_exptl_absorpt_correction_T_max  0.91
_exptl_absorpt_correction_T_min  0.76
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
; 
North A.C.T., Phillips D.C. & Mathews F.S. (1968) Acta. Cryst. A24, 351
Number of psi-scan sets used was   3
Theta correction was applied.
Averaged transmission function was used.
No Fourier smoothing was applied.

;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.278
_exptl_crystal_description       prism
_exptl_crystal_F_000             864
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.186
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.0053(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     132
_refine_ls_number_reflns         2045
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0654
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0704P)^2^+0.41P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1249
_refine_ls_wR_factor_ref         0.1368
_reflns_number_gt                1550
_reflns_number_total             2045
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo202437r_si_001.cif
_cod_data_source_block           ioh29
_cod_database_code               4026972