Isolation and structural determination of two derivatives of the elusive carbamic acid
Aresta, Michele; Ballivet-Tkatchenko, Danielle; Dell’Amico, Daniela Belli; Boschi, Daniele; Calderazzo, Fausto; Labella, Luca; Bonnet, Michel C.; Faure, René; Marchetti, Fabio; Chemical Communications  (2000) 1099–; doi:10.1039/b002479l

data_7110950
_publ_section_title
;
 Isolation and structural determination of two derivatives of the elusive
 carbamic acid
;
_journal_issue                   13
_journal_name_full               'Chemical Communications'
_journal_page_first              1099
_journal_paper_doi               10.1039/b002479l
_journal_year                    2000
_chemical_formula_moiety         (C6H5CH2)2NCOOH
_chemical_formula_sum            'C15 H15 N O2'
_chemical_formula_weight         241.28
_chemical_name_systematic
; 
N,N-dibenzycarbamic acid 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 110.900(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   39.397(7)
_cell_length_b                   5.5450(10)
_cell_length_c                   24.783(3)
_cell_measurement_reflns_used    35
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.604
_cell_measurement_theta_min      13.749
_cell_volume                     5057.8(15)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens XSCANS'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-92
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.400
_diffrn_measured_fraction_theta_max 0.400
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '2\q/\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0260
_diffrn_reflns_av_sigmaI/netI    0.0471
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -44
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            4675
_diffrn_reflns_theta_full        24.01
_diffrn_reflns_theta_max         24.01
_diffrn_reflns_theta_min         2.21
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_type   'not corrected'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Fragment of needle'
_exptl_crystal_F_000             2048
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.88
_exptl_crystal_size_min          0.36
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         3557
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0826
_refine_ls_R_factor_gt           0.0411
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0456P)^2^+0.6772P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0845
_refine_ls_wR_factor_ref         0.1012
_reflns_number_gt                2360
_reflns_number_total             3557
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b002479lsup1.cif
_cod_data_source_block           carbambr
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0456P)^2^+0.6772P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0456P)^2^+0.6772P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        5057.8(14)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7110950