Experimental and theoretical study of intramolecular O⋯O interaction in structurally rigid β-keto carboxylic esters
Sharma, Chiranjeev; Singh, Ashawani K.; Joy, Jyothish; Jemmis, Eluvathingal D.; Awasthi, Satish K.; RSC Advances 6 (2016) 91689–; doi:10.1039/C6RA20483J

data_7236260
_publ_section_title
;
 Experimental and theoretical study of intramolecular O&#x22EF;O
 interaction in structurally rigid \b-keto carboxylic esters
;
_journal_issue                   94
_journal_name_full               'RSC Advances'
_journal_page_first              91689
_journal_paper_doi               10.1039/C6RA20483J
_journal_volume                  6
_journal_year                    2016
_chemical_formula_moiety         'C15 H18 Cl N O4'
_chemical_formula_sum            'C15 H18 Cl N O4'
_chemical_formula_weight         311.75
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_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
;
2013-01-17 deposited with the CCDC.
2016-09-19 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.2728(6)
_cell_length_b                   9.4396(11)
_cell_length_c                   26.241(4)
_cell_measurement_reflns_used    1370
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.0341
_cell_measurement_theta_min      3.0989
_cell_volume                     1553.8(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0200
_diffrn_reflns_av_sigmaI/netI    0.0392
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            6111
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         3.11
_exptl_absorpt_coefficient_mu    0.260
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.86884
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlis PRO; Oxford Diffraction, 2009)'
_exptl_crystal_colour            White
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             656
_exptl_crystal_size_max          .30
_exptl_crystal_size_mid          .28
_exptl_crystal_size_min          .25
_refine_diff_density_max         0.165
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.01(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         3045
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0643
_refine_ls_R_factor_gt           0.0508
_refine_ls_shift/su_max          0.088
_refine_ls_shift/su_mean         0.016
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0558P)^2^+0.1869P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1096
_refine_ls_wR_factor_ref         0.1163
_reflns_number_gt                2512
_reflns_number_total             3045
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6ra20483j2.cif
_cod_data_source_block           shelxl
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/RSC/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
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_cod_database_code               7236260