A stable germanone as the first isolated heavy ketone with a terminal oxygen atom.
Li, Liangchun; Fukawa, Tomohide; Matsuo, Tsukasa; Hashizume, Daisuke; Fueno, Hiroyuki; Tanaka, Kazuyoshi; Tamao, Kohei; Nature chemistry 4 (2012) 361–365; doi:10.1038/nchem.1305

data_1508194
_publ_section_title
;
 A stable germanone as the first isolated heavy ketone with a terminal
 oxygen atom.
;
_journal_issue                   5
_journal_name_full               'Nature chemistry'
_journal_page_first              361
_journal_page_last               365
_journal_paper_doi               10.1038/nchem.1305
_journal_volume                  4
_journal_year                    2012
_chemical_formula_moiety         'C59 H96 Ge O2, 0.25(C5 H12)'
_chemical_formula_sum            'C60.25 H99 Ge O2'
_chemical_formula_weight         927.98
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           88
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a :2'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   38.9676(3)
_cell_length_b                   38.9676(3)
_cell_length_c                   14.26610(10)
_cell_measurement_reflns_used    289745
_cell_measurement_temperature    90
_cell_measurement_theta_max      30.03
_cell_measurement_theta_min      1.05
_cell_volume                     21662.7(3)
_computing_cell_refinement       HKL2000
_computing_data_collection       CrystalClear
_computing_data_reduction        HKL2000
_computing_molecular_graphics    'ORTEP-3 for Windows'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  SHELXL-97
_computing_structure_solution    SIR2004
_diffrn_ambient_temperature      90
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Rigaku AFC-8 with Saturn70 CCD'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0777
_diffrn_reflns_av_sigmaI/netI    0.0348
_diffrn_reflns_limit_h_max       54
_diffrn_reflns_limit_h_min       -54
_diffrn_reflns_limit_k_max       54
_diffrn_reflns_limit_k_min       -54
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            283150
_diffrn_reflns_theta_full        30.03
_diffrn_reflns_theta_max         30.03
_diffrn_reflns_theta_min         1.05
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.606
_exptl_absorpt_correction_T_max  0.89732
_exptl_absorpt_correction_T_min  0.85030
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 MULABS - Empirical Correction for Absorption Anisotropy.
 R.H. Blessing, Acta Crystallogr., Sect. A. 51, 33-38 (1995).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.138
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             8136
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.392
_refine_diff_density_min         -0.789
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.016
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     695
_refine_ls_number_reflns         15854
_refine_ls_number_restraints     131
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0587
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0484P)^2^+15.8144P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0901
_refine_ls_wR_factor_ref         0.0999
_reflns_number_gt                12030
_reflns_number_total             15854
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            nchem.1305-s7.cif
_cod_data_source_block           Eind2GeO-acetone
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_database_code               1508194