Isomorphic supramolecular structures via one-dimensional hydrogen bonding motifs in crystals of chiral difluorolactates, trichlorolactates and trifluorolactates
Takahashi, Satoshi; Jukurogi, Tatsuya; Katagiri, Toshimasa; Uneyama, Kenji; CrystEngComm 8 (2006) 320–; doi:10.1039/b600325g

data_7203262
_publ_section_title
;
 Isomorphic supramolecular structures via one-dimensional hydrogen
 bonding motifs in crystals of chiral difluorolactates,
 trichlorolactates and trifluorolactates
;
_journal_issue                   4
_journal_name_full               CrystEngComm
_journal_page_first              320
_journal_paper_doi               10.1039/b600325g
_journal_volume                  8
_journal_year                    2006
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C6 H10 F2 O3'
_chemical_formula_sum            'C6 H10 F2 O3'
_chemical_formula_weight         168.14
_chemical_melting_point          335
_chemical_name_common            Isopropyl-(R)-(-)-3,3-difluorolactate
_chemical_optical_rotation       '[\a]^25^~D~= -2.21 (c= 1.38, MeOH)'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2005-12-8 CheckCIF
;
_cell_angle_alpha                90.000
_cell_angle_beta                 90.000
_cell_angle_gamma                90.000
_cell_formula_units_Z            4
_cell_length_a                   5.2602(4)
_cell_length_b                   9.2900(10)
_cell_length_c                   16.674(3)
_cell_measurement_reflns_used    6269
_cell_measurement_temperature    120(1)
_cell_measurement_theta_max      54.9
_cell_measurement_theta_min      8.1
_cell_volume                     814.81(18)
_computing_cell_refinement       'PAPID-AUTO (Rigaku)'
_computing_data_collection       'RAPID-AUTO (Rigaku)'
_computing_data_reduction        'teXsan Ver. 1.11 (MSC)'
_computing_molecular_graphics    'Mercury Ver. 1.4 (Bruno et al., 2002)'
_computing_publication_material  'WinGX Ver. 1.7 (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      120(1)
_diffrn_detector_area_resol_mean 10
_diffrn_measured_fraction_theta_full 0.939
_diffrn_measured_fraction_theta_max 0.939
_diffrn_measurement_device_type  'Rigaku R-AXIS IV imaging plate'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rigaku rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0105
_diffrn_reflns_av_sigmaI/netI    0.0174
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            6180
_diffrn_reflns_theta_full        27.43
_diffrn_reflns_theta_max         27.43
_diffrn_reflns_theta_min         4.06
_exptl_absorpt_coefficient_mu    0.135
_exptl_absorpt_correction_T_max  0.9866
_exptl_absorpt_correction_T_min  0.9800
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; '(HIGASHI, T. (1995). Abscor - Empirical Absorption Correction
based on Fourier Series Approximation. Rigaku Corporation, Tokyo, Japan.)'
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.371
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.145
_refine_diff_density_rms         0.038
_refine_ls_abs_structure_details
; The absolute configuration was assigned to agree with
that of its precursor (R)-2,2-difluorolactic acid at the chiral centre C2.
This compound has no atom heavier than Si and analyzed by
Mo radiation so that Flack parameter is not listed.
Freidel pairs were merged before refinement.
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     126
_refine_ls_number_reflns         1043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0346
_refine_ls_R_factor_gt           0.0331
_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^)+(0.0684P)^2^+0.0514P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0880
_refine_ls_wR_factor_ref         0.0888
_reflns_number_gt                996
_reflns_number_total             1043
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b600325g.txt
_cod_data_source_block           (R)-4
_cod_database_code               7203262