1,3-Dimethylimidazolium-2-carboxylate: the unexpected synthesis of an ionic liquid precursor and carbene-CO2 adduct
Holbrey, John D.; Reichert, W. Matthew; Tkatchenko, Igor; Bouajila, Ezzedine; Walter, Olaf; Tommasi, Immacolata; Rogers, Robin D.; Chemical Communications (Cambridge, United Kingdom)  (2003) 28–29; doi:10.1039/b211519k

data_7103637
_publ_section_title
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 1,3-Dimethylimidazolium-2-carboxylate: the unexpected synthesis of an
 ionic liquid precursor and carbene-CO2 adduct
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   1
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              28
_journal_page_last               29
_journal_paper_doi               10.1039/b211519k
_journal_year                    2003
_chemical_formula_sum            'C3 H4 N O'
_chemical_formula_weight         70.07
_space_group_IT_number           60
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.3253(14)
_cell_length_b                   11.5995(19)
_cell_length_c                   6.7148(11)
_cell_measurement_temperature    200(2)
_cell_volume                     648.44(19)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.834
_diffrn_measured_fraction_theta_max 0.834
_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  0.0501
_diffrn_reflns_av_sigmaI/netI    0.0276
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            6176
_diffrn_reflns_theta_full        28.30
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.110
_exptl_crystal_density_diffrn    1.436
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             296
_refine_diff_density_max         0.215
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.952
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     50
_refine_ls_number_reflns         800
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.952
_refine_ls_R_factor_all          0.0513
_refine_ls_R_factor_gt           0.0358
_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^)+(0.0639P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0939
_refine_ls_wR_factor_ref         0.0998
_reflns_number_gt                581
_reflns_number_total             800
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b211519k.txt
_cod_data_source_block           it1
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0639P)^2^+0.0000P] 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^)+(0.0639P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_database_code               7103637