##############################################################################
###                                                                        ###
###        Electronic paper (Acta Crystallographica Section E)             ###
###                                                                        ###
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#                                                                            #
# This CIF contains the data in a paper accepted for publication in Acta     #
# Crystallographica Section E. It conforms to the requirements of Notes      #
# for Authors for Section E, and has been peer reviewed under the auspices   #
# of the IUCr Commission on Journals.                                        #
#                                                                            #
# Full details of the Crystallographic Information File format               #
# are given in the paper "The Crystallographic Information File (CIF):       #
# a New Standard Archive File for Crystallography" by S. R. Hall, F. H.      #
# Allen and I. D. Brown [Acta Cryst. (1991), A47, 655-685].                  #
#                                                                            #
# The current version of the core CIF dictionary is obtainable from          #
# ftp://ftp.iucr.org/pub/cif_core.dic. The current version number is 2.4.    #
#                                                                            #
# Software is freely available for graphical display of the structure(s) in  #
# this CIF.  For information consult the CIF home page http://www.iucr.org/  #
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data_global
_audit_creation_method     SHELXL-97
_journal_data_validation_number     ?
_journal_date_recd_electronic     2009-04-14
_journal_date_accepted     2009-05-28
_journal_name_full     'Acta Crystallographica, Section E'
_journal_year     2009
_journal_volume     65
_journal_issue      7
_journal_page_first     o1483
_journal_page_last     o1483
_journal_paper_category     QO
_journal_coeditor_code     WN2324
_publ_contact_author_name     'Professor QinPei Wu'
_publ_contact_author_address
;School of Chemical Engineering and Environment,
Beijing Institute of Technology,
Beijing 100081,
People's Republic of China
;
_publ_contact_author_email     qpw@bit.edu.cn
_publ_contact_author_fax     '86(10)68945474'
_publ_contact_author_phone     '86(10)68945474'
_publ_section_title
;
(R)-2-[(R)-2,2-Dimethyl-1,3-dioxolan-4-yl]-1,3-oxathiolan-5-one
;
loop_
    _publ_author_name
    _publ_author_footnote
    _publ_author_address
    'Wu, Qin-Pei' .
;
School of Chemical Engineering and Environment,
Beijing Institute of Technology,
Beijing 100081,
People's Republic of China
;
    'Shi, Da-Xin' .
;
School of Chemical Engineering and Environment,
Beijing Institute of Technology,
Beijing 100081,
People's Republic of China
;
    'Wang, Hao' .
;
School of Life Science,
Beijing Institute of Technology,
Beijing 100081,
People's Republic of China
;
    'Zhang, Qing-Shan' .
;
School of Chemical Engineering and Environment,
Beijing Institute of Technology,
Beijing 100081,
People's Republic of China
;
data_I
_chemical_name_systematic
;
(R)-2-[(R)-2,2-Dimethyl-1,3-dioxolan-4-yl]-1,3-oxathiolan-5-one
;
_chemical_name_common     ?
_chemical_formula_moiety     'C8 H12 O4 S'
_chemical_formula_sum     'C8 H12 O4 S'
_chemical_formula_structural     ?
_chemical_formula_analytical     ?
_chemical_formula_iupac     'C8 H12 O4 S'
_chemical_formula_weight     204.24
_chemical_melting_point     ?
_symmetry_cell_setting     monoclinic
_symmetry_space_group_name_H-M     'P 21'
_symmetry_space_group_name_Hall     ?
loop_
    _symmetry_equiv_pos_as_xyz
    'x, y, z'
    '-x, y+1/2, -z'
_cell_length_a     6.5528(13)
_cell_length_b     9.4029(19)
_cell_length_c     7.9240(16)
_cell_angle_alpha     90.00
_cell_angle_beta     106.60(3)
_cell_angle_gamma     90.00
_cell_volume     467.89(16)
_cell_formula_units_Z     2
_cell_measurement_reflns_used     1941
_cell_measurement_theta_min     2.68
_cell_measurement_theta_max     27.48
_cell_measurement_temperature     293(2)
_exptl_crystal_description     block
_exptl_crystal_colour     colourless
_exptl_crystal_size_max     0.50
_exptl_crystal_size_mid     0.20
_exptl_crystal_size_min     0.15
_exptl_crystal_density_diffrn     1.450
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     'not measured'
_exptl_crystal_F_000     216
_exptl_absorpt_coefficient_mu     0.326
_exptl_absorpt_correction_type     multi-scan
_exptl_absorpt_process_details     '(CrystalClear; Rigaku/MSC, 2005)'
_exptl_absorpt_correction_T_min     0.859
_exptl_absorpt_correction_T_max     0.952
_exptl_special_details
;
¹H NMR(CDCl₃,P.P.M.):
1.41 (d, 6 H), 3.58(d, 4 H),
3.77 (d, 1 H), 3.92 (dd, 1 H),
4.12 (dd, 1 H), 4.35 (m, 1 H), 5.45(d, 1 H).
;
_diffrn_ambient_temperature     293(2)
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_source     'fine-focus sealed tube'
_diffrn_radiation_monochromator     graphite
_diffrn_measurement_device_type     'Rigaku Saturn CCD area-detector'
_diffrn_measurement_method     Ω
_diffrn_detector_area_resol_mean     10.00
_diffrn_reflns_number     1941
_diffrn_reflns_av_R_equivalents     0.0562
_diffrn_reflns_av_sigmaI/netI     0.0283
_diffrn_reflns_theta_min     2.68
_diffrn_reflns_theta_max     27.48
_diffrn_reflns_theta_full     27.48
_diffrn_measured_fraction_theta_max     0.973
_diffrn_measured_fraction_theta_full     0.973
_diffrn_reflns_limit_h_min     -8
_diffrn_reflns_limit_h_max     8
_diffrn_reflns_limit_k_min     -12
_diffrn_reflns_limit_k_max     11
_diffrn_reflns_limit_l_min     -10
_diffrn_reflns_limit_l_max     10
_diffrn_standards_number     0
_diffrn_standards_interval_count     0
_diffrn_standards_interval_time     0
_diffrn_standards_decay_%     0
_refine_special_details
;
Refinement of F² against ALL reflections. The weighted R-factor
wR and goodness of fit S are based on F², conventional
R-factors R are based on F, with F set to zero for
negative F². The threshold expression of F² >
σ(F²) is used only for calculating R-factors(gt) etc.
and is not relevant to the choice of reflections for refinement.
R-factors based on F² are statistically about twice as large
as those based on F, and R- factors based on ALL data will be
even larger.
;
_reflns_number_total     1705
_reflns_number_gt     1275
_reflns_threshold_expression     I>2σ(I)
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.0542
_refine_ls_R_factor_gt     0.0421
_refine_ls_wR_factor_gt     0.1215
_refine_ls_wR_factor_ref     0.1294
_refine_ls_goodness_of_fit_ref     1.009
_refine_ls_restrained_S_all     1.008
_refine_ls_number_reflns     1705
_refine_ls_number_parameters     119
_refine_ls_number_restraints     1
_refine_ls_hydrogen_treatment     constr
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
                  'calc w=1/[σ²(Fo²)+(0.088P)²] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary     difmap
_refine_ls_shift/su_max     0.000
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     0.241
_refine_diff_density_min     -0.201
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_extinction_coef     0.102(15)
_refine_ls_extinction_expression
                                  'Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^'
_refine_ls_abs_structure_details     'Flack (1983), 593 Friedel pairs'
_refine_ls_abs_structure_Flack     -0.01(13)
loop_
    _atom_type_symbol
    _atom_type_description
    _atom_type_scat_dispersion_real
    _atom_type_scat_dispersion_imag
    _atom_type_scat_source
    'C' 'C' 0.0033 0.0016
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'H' 'H' 0.0000 0.0000
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'N' 'N' 0.0061 0.0033
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'O' 'O' 0.0106 0.0060
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection     'RAPID-AUTO (Rigaku/MSC, 2005)'
_computing_cell_refinement     'RAPID-AUTO (Rigaku/MSC, 2005)'
_computing_data_reduction     'CrystalStructure (Rigaku/MSC, 2005)'
_computing_structure_solution     'SHELXS97 (Sheldrick, 2008)'
_computing_structure_refinement     'SHELXL97 (Sheldrick, 2008)'
_computing_molecular_graphics     'SHELXTL (Sheldrick, 2008)'
_computing_publication_material     'SHELXL97 (Sheldrick, 2008)'
loop_
    _atom_site_type_symbol
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_adp_type
    _atom_site_calc_flag
    _atom_site_refinement_flags
    _atom_site_occupancy
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    S S1 0.57296(17) 0.19608(12) 0.31212(10) 0.0733(4) Uani d . 1 . .
    O O1 0.7766(4) 0.0255(3) 0.5605(3) 0.0514(6) Uani d . 1 . .
    O O2 1.1103(4) 0.0457(3) 0.5630(4) 0.0734(8) Uani d . 1 . .
    O O3 0.8026(4) 0.1607(2) 0.9331(3) 0.0560(6) Uani d . 1 . .
    O O4 0.7352(4) 0.2936(2) 0.6920(3) 0.0482(5) Uani d . 1 . .
    C C1 0.8546(6) 0.1980(5) 0.3737(4) 0.0612(9) Uani d . 1 . .
    H H1A 0.9049 0.1803 0.2718 0.073 Uiso calc R 1 . .
    H H1B 0.9075 0.2899 0.4225 0.073 Uiso calc R 1 . .
    C C2 0.9307(6) 0.0859(4) 0.5061(4) 0.0502(8) Uani d . 1 . .
    C C3 0.5800(5) 0.1011(4) 0.5101(4) 0.0509(8) Uani d . 1 . .
    H H3 0.4622 0.0328 0.4851 0.061 Uiso calc R 1 . .
    C C4 0.5669(5) 0.1947(4) 0.6584(4) 0.0486(7) Uani d . 1 . .
    H H4 0.4302 0.2451 0.6269 0.058 Uiso calc R 1 . .
    C C5 0.5987(5) 0.1192(5) 0.8312(4) 0.0567(9) Uani d . 1 . .
    H H5A 0.4914 0.1477 0.8871 0.068 Uiso calc R 1 . .
    H H5B 0.5915 0.0169 0.8144 0.068 Uiso calc R 1 . .
    C C6 0.8418(5) 0.2954(4) 0.8756(4) 0.0486(8) Uani d . 1 . .
    C C7 1.0731(6) 0.3117(5) 0.9004(6) 0.0742(11) Uani d . 1 . .
    H H7A 1.1010 0.4044 0.8614 0.111 Uiso calc R 1 . .
    H H7B 1.1201 0.2405 0.8330 0.111 Uiso calc R 1 . .
    H H7C 1.1483 0.3006 1.0228 0.111 Uiso calc R 1 . .
    C C8 0.7487(7) 0.4089(5) 0.9608(5) 0.0743(12) Uani d . 1 . .
    H H8A 0.7778 0.5000 0.9182 0.111 Uiso calc R 1 . .
    H H8B 0.8106 0.4046 1.0861 0.111 Uiso calc R 1 . .
    H H8C 0.5975 0.3954 0.9332 0.111 Uiso calc R 1 . .
loop_
    _atom_site_aniso_label
    _atom_site_aniso_U_11
    _atom_site_aniso_U_22
    _atom_site_aniso_U_33
    _atom_site_aniso_U_12
    _atom_site_aniso_U_13
    _atom_site_aniso_U_23
    S1 0.0745(6) 0.0908(9) 0.0459(4) -0.0108(6) 0.0034(4) 0.0026(5)
    O1 0.0541(13) 0.0404(12) 0.0659(14) -0.0020(10) 0.0269(11) -0.0011(11)
    O2 0.0606(17) 0.0628(18) 0.107(2) 0.0052(14) 0.0402(16) -0.0045(16)
    O3 0.0649(15) 0.0446(14) 0.0563(12) 0.0047(11) 0.0139(10) 0.0108(11)
    O4 0.0566(12) 0.0465(12) 0.0411(10) -0.0113(11) 0.0132(9) 0.0000(9)
    C1 0.082(2) 0.053(2) 0.0589(18) -0.012(2) 0.0367(17) -0.0009(17)
    C2 0.059(2) 0.0397(17) 0.0597(18) -0.0016(15) 0.0293(16) -0.0084(14)
    C3 0.0457(16) 0.0508(19) 0.0557(17) -0.0117(15) 0.0134(14) -0.0050(16)
    C4 0.0389(14) 0.0522(19) 0.0563(15) -0.0025(15) 0.0163(12) 0.0032(17)
    C5 0.0558(19) 0.060(2) 0.062(2) -0.0076(17) 0.0287(17) 0.0027(16)
    C6 0.0548(19) 0.0429(18) 0.0453(16) 0.0041(15) 0.0100(14) 0.0022(13)
    C7 0.058(2) 0.065(3) 0.088(3) -0.0082(19) 0.004(2) -0.004(2)
    C8 0.106(3) 0.057(2) 0.063(2) 0.015(2) 0.027(2) -0.0093(18)
_geom_special_details
;
All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell e.s.d.'s are taken
into account individually in the estimation of e.s.d.'s in distances, angles
and torsion angles; correlations between e.s.d.'s in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s.
planes.
;
loop_
    _geom_bond_atom_site_label_1
    _geom_bond_atom_site_label_2
    _geom_bond_site_symmetry_2
    _geom_bond_distance
    _geom_bond_publ_flag
    S1 C1 . 1.769(4) ?
    S1 C3 . 1.795(4) ?
    O1 C2 . 1.333(4) ?
    O1 C3 . 1.425(4) ?
    O2 C2 . 1.195(4) ?
    O3 C6 . 1.395(4) ?
    O3 C5 . 1.405(4) ?
    O4 C4 . 1.408(4) ?
    O4 C6 . 1.423(4) ?
    C1 C2 . 1.470(5) ?
    C1 H1A . 0.9700 ?
    C1 H1B . 0.9700 ?
    C3 C4 . 1.490(5) ?
    C3 H3 . 0.9800 ?
    C4 C5 . 1.504(5) ?
    C4 H4 . 0.9800 ?
    C5 H5A . 0.9700 ?
    C5 H5B . 0.9700 ?
    C6 C8 . 1.483(5) ?
    C6 C7 . 1.480(5) ?
    C7 H7A . 0.9600 ?
    C7 H7B . 0.9600 ?
    C7 H7C . 0.9600 ?
    C8 H8A . 0.9600 ?
    C8 H8B . 0.9600 ?
    C8 H8C . 0.9600 ?
loop_
    _geom_angle_atom_site_label_1
    _geom_angle_atom_site_label_2
    _geom_angle_atom_site_label_3
    _geom_angle_site_symmetry_1
    _geom_angle_site_symmetry_3
    _geom_angle
    _geom_angle_publ_flag
    C1 S1 C3 . . 89.97(16) ?
    C2 O1 C3 . . 113.9(3) ?
    C6 O3 C5 . . 107.4(3) ?
    C4 O4 C6 . . 109.3(2) ?
    C2 C1 S1 . . 107.7(3) ?
    C2 C1 H1A . . 110.2 ?
    S1 C1 H1A . . 110.2 ?
    C2 C1 H1B . . 110.2 ?
    S1 C1 H1B . . 110.2 ?
    H1A C1 H1B . . 108.5 ?
    O2 C2 O1 . . 119.9(3) ?
    O2 C2 C1 . . 126.4(3) ?
    O1 C2 C1 . . 113.7(3) ?
    O1 C3 C4 . . 109.0(3) ?
    O1 C3 S1 . . 106.8(2) ?
    C4 C3 S1 . . 113.7(3) ?
    O1 C3 H3 . . 109.1 ?
    C4 C3 H3 . . 109.1 ?
    S1 C3 H3 . . 109.1 ?
    O4 C4 C3 . . 108.7(2) ?
    O4 C4 C5 . . 104.0(3) ?
    C3 C4 C5 . . 114.5(3) ?
    O4 C4 H4 . . 109.8 ?
    C3 C4 H4 . . 109.8 ?
    C5 C4 H4 . . 109.8 ?
    O3 C5 C4 . . 104.7(3) ?
    O3 C5 H5A . . 110.8 ?
    C4 C5 H5A . . 110.8 ?
    O3 C5 H5B . . 110.8 ?
    C4 C5 H5B . . 110.8 ?
    H5A C5 H5B . . 108.9 ?
    O3 C6 O4 . . 103.9(3) ?
    O3 C6 C8 . . 111.5(3) ?
    O4 C6 C8 . . 109.2(3) ?
    O3 C6 C7 . . 109.1(3) ?
    O4 C6 C7 . . 108.8(3) ?
    C8 C6 C7 . . 113.8(4) ?
    C6 C7 H7A . . 109.5 ?
    C6 C7 H7B . . 109.5 ?
    H7A C7 H7B . . 109.5 ?
    C6 C7 H7C . . 109.5 ?
    H7A C7 H7C . . 109.5 ?
    H7B C7 H7C . . 109.5 ?
    C6 C8 H8A . . 109.5 ?
    C6 C8 H8B . . 109.5 ?
    H8A C8 H8B . . 109.5 ?
    C6 C8 H8C . . 109.5 ?
    H8A C8 H8C . . 109.5 ?
    H8B C8 H8C . . 109.5 ?
loop_
    _geom_torsion_atom_site_label_1
    _geom_torsion_atom_site_label_2
    _geom_torsion_atom_site_label_3
    _geom_torsion_atom_site_label_4
    _geom_torsion_site_symmetry_1
    _geom_torsion_site_symmetry_2
    _geom_torsion_site_symmetry_3
    _geom_torsion_site_symmetry_4
    _geom_torsion
    _geom_torsion_publ_flag
    C3 S1 C1 C2 . . . . 19.2(3) ?
    C3 O1 C2 O2 . . . . 168.2(3) ?
    C3 O1 C2 C1 . . . . -13.0(4) ?
    S1 C1 C2 O2 . . . . 171.1(3) ?
    S1 C1 C2 O1 . . . . -7.6(4) ?
    C2 O1 C3 C4 . . . . -96.1(3) ?
    C2 O1 C3 S1 . . . . 27.2(3) ?
    C1 S1 C3 O1 . . . . -26.0(3) ?
    C1 S1 C3 C4 . . . . 94.2(3) ?
    C6 O4 C4 C3 . . . . -130.9(3) ?
    C6 O4 C4 C5 . . . . -8.5(3) ?
    O1 C3 C4 O4 . . . . 61.7(3) ?
    S1 C3 C4 O4 . . . . -57.3(3) ?
    O1 C3 C4 C5 . . . . -54.1(3) ?
    S1 C3 C4 C5 . . . . -173.1(2) ?
    C6 O3 C5 C4 . . . . 28.4(3) ?
    O4 C4 C5 O3 . . . . -11.8(4) ?
    C3 C4 C5 O3 . . . . 106.7(3) ?
    C5 O3 C6 O4 . . . . -33.7(3) ?
    C5 O3 C6 C8 . . . . 83.8(3) ?
    C5 O3 C6 C7 . . . . -149.6(3) ?
    C4 O4 C6 O3 . . . . 25.9(3) ?
    C4 O4 C6 C8 . . . . -93.2(4) ?
    C4 O4 C6 C7 . . . . 142.0(3) ?
loop_
    _geom_hbond_atom_site_label_D
    _geom_hbond_atom_site_label_H
    _geom_hbond_atom_site_label_A
    _geom_hbond_site_symmetry_A
    _geom_hbond_distance_DH
    _geom_hbond_distance_HA
    _geom_hbond_distance_DA
    _geom_hbond_angle_DHA
    _geom_hbond_publ_flag
    C1 H1A O3 1_554 0.97 2.58 3.428(4) 146 y
    C1 H1B O2 2_756 0.97 2.41 3.306(6) 153 y
    C3 H3 O2 1_455 0.98 2.55 3.265(4) 129 y
