Solid-state UV-MALDI mass spectrometric quantitation of fluroxypyr and triclopyr in soil
Ivanova, B.; Spiteller, M.; Environmental Geochemistry and Health  (2015) –; doi:10.1007/s10653-014-9673-9

data_1518475
_publ_section_title
;
 Solid-state UV-MALDI mass spectrometric quantitation of
 fluroxypyr and triclopyr in soil
;
_journal_name_full               'Environmental Geochemistry and Health'
_journal_paper_doi               10.1007/s10653-014-9673-9
_journal_year                    2015
_chemical_formula_moiety         'C7 H18 N2, C4 H2 O4, 2(C4 H O4), O'
_chemical_formula_sum            'C19 H22 N2 O13'
_chemical_formula_weight         486.39
_chemical_name_common
'2-piperazine-1-yl-ethyl ammonium tris(hydrogensquarate) monohydrate'
_chemical_name_systematic        ?
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 94.823(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.975(3)
_cell_length_b                   11.085(3)
_cell_length_c                   18.066(5)
_cell_measurement_temperature    200(2)
_cell_volume                     1990.5(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker GIS'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker APEX2'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART X2S'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'doubly curved silicon crystal'
_diffrn_radiation_source         'micro-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.3455
_diffrn_reflns_av_sigmaI/netI    0.2105
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9677
_diffrn_reflns_theta_full        22.59
_diffrn_reflns_theta_max         22.59
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    0.139
_exptl_absorpt_correction_T_max  0.9833
_exptl_absorpt_correction_T_min  0.9800
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.623
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1016
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.457
_refine_diff_density_min         -0.396
_refine_diff_density_rms         0.088
_refine_ls_extinction_coef       0.0021(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.874
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     313
_refine_ls_number_reflns         2611
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.874
_refine_ls_R_factor_all          0.1096
_refine_ls_R_factor_gt           0.0797
_refine_ls_shift/su_max          0.018
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0924P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1926
_refine_ls_wR_factor_ref         0.2152
_reflns_number_gt                1659
_reflns_number_total             2624
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            Struct-132-4.txt
_cod_data_source_block           bi132
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 2827 2014-09-09 07:05:25Z andrius 
;
_cod_original_cell_volume        1990.5(9)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1518475