The reactions of α-amino acids and α-amino acid esters with high valent transition metal halides: synthesis of coordination complexes, activation processes and stabilization of α-ammonium acylchloride cations
Biancalana, Lorenzo; Bortoluzzi, Marco; Ferretti, Eleonora; Hayatifar, Mohammad; Marchetti, Fabio; Pampaloni, Guido; Zacchini, Stefano; RSC Adv. 7 (2017) 10158–; doi:10.1039/C7RA00073A

data_7227638
_publ_section_title
;
 The reactions of \a-amino acids and \a-amino acid esters with high valent
 transition metal halides: synthesis of coordination complexes, activation
 processes and stabilization of \a-ammonium acylchloride cations
;
_journal_issue                   17
_journal_name_full               'RSC Adv.'
_journal_page_first              10158
_journal_paper_doi               10.1039/C7RA00073A
_journal_volume                  7
_journal_year                    2017
_chemical_formula_sum            'C10 H12 Cl8 N2 Nb2 O2'
_chemical_formula_weight         661.64
_chemical_name_systematic
; 
 ? 
;
_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
_audit_update_record
;
2014-12-27 deposited with the CCDC.
2017-01-30 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 103.854(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.7734(9)
_cell_length_b                   13.4440(18)
_cell_length_c                   11.9844(16)
_cell_measurement_reflns_used    4334
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.544
_cell_measurement_theta_min      2.315
_cell_volume                     1059.6(2)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1996)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0261
_diffrn_reflns_av_unetI/netI     0.0264
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            8389
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         2.31
_exptl_absorpt_coefficient_mu    2.097
_exptl_absorpt_correction_T_max  0.7438
_exptl_absorpt_correction_T_min  0.6330
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
; 
 Data were corrected for Lorentz polarization and absorption
 effects (empirical absorption correction SADABS).
 R(int) =  0.0974 (selected reflections only, before parameter refinement)
 R(int) =  0.0403 (selected reflections only, after parameter refinement)
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.074
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.15
_refine_diff_density_max         2.092
_refine_diff_density_min         -1.392
_refine_diff_density_rms         0.132
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         2315
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0476
_refine_ls_R_factor_gt           0.0406
_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^)+(0.0271P)^2^+6.6567P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0874
_refine_ls_wR_factor_ref         0.0913
_reflns_number_gt                2056
_reflns_number_total             2315
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7ra00073a2.cif
_cod_data_source_block           p21c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7227638