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Related Concept Videos

Metallic Solids02:37

Metallic Solids

16.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
16.4K
Ionic Crystal Structures02:42

Ionic Crystal Structures

18.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
18.0K
Valence Bond Theory02:42

Valence Bond Theory

8.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.9K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

13.8K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
13.8K
Coordination Number and Geometry02:57

Coordination Number and Geometry

15.6K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
15.6K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.4K

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Two Cu-complex directed aluminoborates: from 2D layers to 3D frameworks.

Lin Cheng1, Jun-Wei Zhao, Guo-Yu Yang

  • 1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. ygy@fjirsm.ac.cn.

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|April 3, 2014
PubMed
Summary
This summary is machine-generated.

Two novel aluminoborates, one 2D layered and one 3D framework, were synthesized using transition metal complexes. These new materials exhibit unique structures and potential applications in materials science.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystal Engineering

Background:

  • Aluminoborates are an important class of inorganic compounds with diverse structures and properties.
  • Transition metal complexes can act as effective structure-directing agents in the synthesis of novel inorganic materials.

Purpose of the Study:

  • To synthesize and characterize two novel aluminoborates with distinct dimensionalities (2D and 3D).
  • To investigate the structural features and coordination environment of copper within these aluminoborate frameworks.

Main Methods:

  • Solvothermal synthesis was employed for the preparation of the aluminoborate compounds.
  • Characterization techniques included elemental analysis, IR spectroscopy, thermogravimetric analysis, UV/Vis spectroscopy, and X-ray diffraction (powder and single-crystal).

Main Results:

  • Two new aluminoborates, [Cu(enMe)2]3{Al2[B5O8(OH)2]4}·H2O (1) and [Cu(en)2][Al-B5O10] (2), were successfully synthesized.
  • Compound 1 features a 2D layered structure with 16-member rings and a sql net topology.
  • Compound 2 exhibits a 3D open-framework structure with alternating AlO4 and B5O10 units.

Conclusions:

  • The study successfully demonstrated the use of transition metal complexes in directing the formation of novel 2D and 3D aluminoborate structures.
  • The characterized compounds showcase unique structural motifs and coordination behaviors, contributing to the understanding of aluminoborate chemistry.