Observation of a reversible isomorphous phase transition and an interplay of 'sigma-holes' and 'pi-holes' in Fmoc-Leu-psi[CH2-NCS]
Rumpa Pal; Govindappa Nagendra; M. Samarasimhareddy; Vommina V. Sureshbabu; Tayur N. Guru Row; Chem.Commun. 51 (2015) 933–; doi:10.1039/C4cc08751H

data_7116329
_publ_section_title
;
 Observation of a reversible isomorphous phase transition and an interplay
 of 'sigma-holes' and 'pi-holes' in Fmoc-Leu-psi[CH2-NCS]
;
_journal_name_full               Chem.Commun.
_journal_page_first              933
_journal_paper_doi               10.1039/C4cc08751H
_journal_volume                  51
_journal_year                    2015
_chemical_absolute_configuration syn
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C19 H18 N2 O2 S'
_chemical_formula_sum            'C19 H18 N2 O2 S'
_chemical_formula_weight         338.42
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
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_audit_update_record
;
2014-11-01 deposited with the CCDC.
2014-11-24 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.707(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   4.9690(2)
_cell_length_b                   11.3897(4)
_cell_length_c                   15.0388(5)
_cell_measurement_reflns_used    3343
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.0
_cell_measurement_theta_min      2.7
_cell_volume                     850.75(5)
_computing_cell_refinement
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_molecular_graphics
'Ortep-3 (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.0419
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
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_diffrn_measurement_method       'f\w scans'
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_diffrn_radiation_source         'Mova (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0262
_diffrn_reflns_av_sigmaI/netI    0.0438
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            6544
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.999
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_exptl_absorpt_coefficient_mu    0.204
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.85311
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.409
_exptl_crystal_size_mid          0.239
_exptl_crystal_size_min          0.066
_refine_diff_density_max         0.196
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H.D. (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         3343
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0364
_refine_ls_R_factor_gt           0.0337
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0308P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0695
_refine_ls_wR_factor_ref         0.0719
_reflns_number_gt                3180
_reflns_number_total             3343
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4cc08751h2.cif
_cod_data_source_block           u_mono
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7116329