Synthesis of spiro-bisperoxyketals.
Ghorai, Prasanta; Dussault, Patrick H.; Hu, Chunhua; Organic letters 10 (2008) 2401–2404; doi:10.1021/ol800657m

data_1504687
_publ_section_title
;
 Synthesis of spiro-bisperoxyketals.
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_journal_issue                   12
_journal_name_full               'Organic letters'
_journal_page_first              2401
_journal_page_last               2404
_journal_paper_doi               10.1021/ol800657m
_journal_volume                  10
_journal_year                    2008
_chemical_formula_moiety         'C17 H28 O4'
_chemical_formula_sum            'C17 H28 O4'
_chemical_formula_weight         296.39
_space_group_IT_number           54
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2a 2ac'
_symmetry_space_group_name_H-M   'P c c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.6936(11)
_cell_length_b                   6.3812(3)
_cell_length_c                   10.2586(4)
_cell_measurement_reflns_used    7482
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      3.17
_cell_volume                     1616.50(12)
_computing_cell_refinement       'SAINT+ (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2005)'
_computing_data_reduction        SAINT+
_computing_molecular_graphics    'DIAMOND (Brandenburg & Putz, 2007)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 2003)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART Apex CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0180
_diffrn_reflns_av_sigmaI/netI    0.0086
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            20649
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         1.65
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9766
_exptl_absorpt_correction_T_min  0.9109
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.218
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.320
_refine_diff_density_min         -0.246
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     96
_refine_ls_number_reflns         2018
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0405
_refine_ls_R_factor_gt           0.0388
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0662P)^2^+0.4139P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1062
_refine_ls_wR_factor_ref         0.1083
_reflns_number_gt                1888
_reflns_number_total             2018
_reflns_threshold_expression     'I > 2 \s(I)'
_cod_data_source_file            ol800657m-file005.cif
_cod_data_source_block           c7du1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
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_cod_database_code               1504687