The synthesis and analysis of lignin-bound Hibbert ketone structures in technical lignins.
Miles-Barrett, Daniel M; Neal, Andrew R.; Hand, Calum; Montgomery, James R. D.; Panovic, Isabella; Ojo, O. Stephen; Lancefield, Christopher S.; Cordes, David B.; Slawin, Alexandra M. Z.; Lebl, Tomas; Westwood, Nicholas J.; Organic & biomolecular chemistry 14 (2016) 10023–10030; doi:10.1039/c6ob01915c

data_7155288
_publ_section_title
;
 The synthesis and analysis of lignin-bound Hibbert ketone structures in
 technical lignins.
;
_journal_issue                   42
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              10023
_journal_page_last               10030
_journal_paper_doi               10.1039/c6ob01915c
_journal_volume                  14
_journal_year                    2016
_chemical_formula_moiety         'C11 H14 O5'
_chemical_formula_sum            'C11 H14 O5'
_chemical_formula_weight         226.23
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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_date             2016-08-19
_audit_creation_method           'by CrystalStructure 4.2'
_audit_update_record
;
2016-08-19 deposited with the CCDC.
2016-09-22 downloaded from the CCDC.
;
_cell_angle_alpha                90.0000
_cell_angle_beta                 90.113(6)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   7.9885(19)
_cell_length_b                   10.680(3)
_cell_length_c                   12.967(3)
_cell_measurement_reflns_used    1099
_cell_measurement_temperature    173
_cell_measurement_theta_max      46.80
_cell_measurement_theta_min      18.30
_cell_volume                     1106.3(5)
_computing_cell_refinement       'CrystalClear-SM Expert 2.1 b42'
_computing_data_collection       'CrystalClear-SM Expert 2.1 b42 (Rigaku, 2015)'
_computing_data_reduction        'CrystalClear-SM Expert 2.1 b42'
_computing_molecular_graphics    'CrystalStructure 4.2'
_computing_publication_material  'CrystalStructure 4.2 (Rigaku, 2015)'
_computing_structure_refinement  'SHELXL Version 2014/7 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2011 (Burla, et al., 2012)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 5.814
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Rigaku XtaLAB P100'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.1003
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            11222
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        67.687
_diffrn_reflns_theta_max         68.030
_diffrn_reflns_theta_min         5.366
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.913
_exptl_absorpt_correction_T_max  0.955
_exptl_absorpt_correction_T_min  0.762
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.358
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             480.00
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Acetone'
_exptl_crystal_size_max          0.090
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.26
_refine_diff_density_min         -0.28
_refine_ls_extinction_coef       0.0148(18)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.102
_refine_ls_hydrogen_treatment    mixed
_refine_ls_number_parameters     156
_refine_ls_number_reflns         2005
_refine_ls_number_restraints     2
_refine_ls_R_factor_all          0.0570
_refine_ls_R_factor_gt           0.0551
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0865P)^2^+0.0532P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1443
_refine_ls_wR_factor_ref         0.1468
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1834
_reflns_number_total             2005
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c6ob01915c2.cif
_cod_data_source_block           2
_cod_depositor_comments
'Adding full bibliography for 7155287--7155288.cif.'
_cod_database_code               7155288
_shelx_res_checksum              21971