Strength from weakness: opportunistic CH - O hydrogen bonds differentially dictate the conformational fate in solid and solution states
Amol M. Vibhute; Rajesh G. Gonnade; R. S. Swathi; Kana M. Sureshan; Chem.Commun. 48 (2012) 717–; doi:10.1039/c1cc15051k

data_7107166
_publ_section_title
;
 Strength from weakness: opportunistic CH - O hydrogen bonds
 differentially dictate the conformational fate in solid and solution
 states
;
_journal_name_full               Chem.Commun.
_journal_page_first              717
_journal_paper_doi               10.1039/c1cc15051k
_journal_volume                  48
_journal_year                    2012
_chemical_formula_sum            'C16 H24 O8'
_chemical_formula_weight         344.35
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 98.896(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.6432(17)
_cell_length_b                   10.0493(8)
_cell_length_c                   9.1485(8)
_cell_measurement_reflns_used    1487
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.0961
_cell_measurement_theta_min      2.8266
_cell_volume                     1784.2(3)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0688
_diffrn_reflns_av_sigmaI/netI    0.1401
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            7424
_diffrn_reflns_theta_full        26.36
_diffrn_reflns_theta_max         26.36
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.9878
_exptl_absorpt_correction_T_min  0.9678
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.55 (release 05-01-2010 CrysAlis171 .NET)
(compiled Jan 5 2010,16:28:46)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.169
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.783
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     223
_refine_ls_number_reflns         3647
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.783
_refine_ls_R_factor_all          0.1665
_refine_ls_R_factor_gt           0.0516
_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^)+(0.0453P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0975
_refine_ls_wR_factor_ref         0.1198
_reflns_number_gt                1369
_reflns_number_total             3647
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1cc15051k.txt
_cod_data_source_block           epr6
_cod_database_code               7107166