title: New series of indium formates: hydrothermal synthesis, structure and coordination modes.
abstract: Three new indium(III) compounds, In(HCOO)3 (1), In2(HCOO)5(OH) (2), and In(HCOO)2(OH) (3), were synthesized under hydrothermal conditions and characterized by single crystal and powder X-ray diffraction experiments, as well as by IR spectroscopy, elemental analysis, and coupled TG-DSC-MS measurement. All of these compounds adopt 3D framework structures consisting of InO6 octahedra and the 2.11 binding modes of formate with the (syn, syn-; syn, anti-; anti, anti-) configurations. The structural investigation of these indium formates reveals that the gradual introduction of the hydroxyl groups into the structures induces the polymerization of the InO6 octahedra, that is, InO6 is isolated in 1, becomes dimeric in 2, and finally forms 1D chains in 3. In addition, a simple formula that may be used for estimating the overall coordination number of the formate in Ma(HCOO)bLc is proposed.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Su
authors.forename: Yingxia
authors.initials: Y
authors.lastname: Wang
authors.forename: Sihai
authors.initials: S
authors.lastname: Yang
authors.forename: Guobao
authors.initials: G
authors.lastname: Li
authors.forename: Fuhui
authors.initials: F
authors.lastname: Liao
authors.forename: Jianhua
authors.initials: J
authors.lastname: Lin