Nido-boranes

Definition

Nido-boranes are a class of boron hydrides characterized by a unique cage-like structure that contains a boron atom at the center surrounded by several other boron atoms and hydrogen atoms. This arrangement leads to interesting chemical properties and reactivity patterns that distinguish them from other boron hydrides, such as closo- and arachno-boranes, and highlights their significance in the study of inorganic clusters and polymers.

5 Must Know Facts For Your Next Test

1. Nido-boranes typically contain five or six boron atoms and are represented by the general formula BnHn+4, showcasing their unique hydrogen-to-boron ratio.
2. The cage-like structure of nido-boranes results in distinctive angles and bonding environments that lead to their unique reactivity compared to other boron hydrides.
3. Nido-boranes can act as ligands in coordination chemistry, forming complexes with transition metals that enhance their versatility in chemical applications.
4. These compounds have been studied for their potential applications in materials science, catalysis, and hydrogen storage due to their favorable properties.
5. Nido-boranes can be synthesized through various methods, including the reduction of higher boranes or through reactions involving alkali metal borohydrides.

Review Questions

• How do the structural characteristics of nido-boranes influence their chemical behavior compared to other types of boranes?
  • Nido-boranes have a distinctive cage-like structure that sets them apart from other boranes like closo- and arachno-boranes. This structure results in unique angles and bonding situations which affect how they react chemically. The presence of a central boron atom surrounded by other boron and hydrogen atoms creates different sites for chemical interactions, leading to varied reactivity patterns compared to the more stable closed structures of closo-boranes.
• Discuss the significance of nido-boranes in the context of coordination chemistry and their role as ligands.
  • Nido-boranes play a significant role in coordination chemistry due to their ability to function as versatile ligands. Their unique cage-like structure allows them to bind to transition metals effectively, creating stable complexes. This property is particularly useful in catalysis, where the nido-borane can influence the reactivity of metal centers and facilitate various chemical transformations.
• Evaluate the potential applications of nido-boranes in materials science and energy storage technologies.
  • Nido-boranes hold promising potential for applications in materials science and energy storage technologies due to their unique structural properties and reactivity. For instance, their ability to store hydrogen efficiently makes them candidates for hydrogen storage solutions, which is crucial for fuel cell technology. Additionally, their versatile bonding capabilities allow for the design of novel materials with tailored properties for use in catalysis or as functional materials in electronic devices.

Related terms

Closo-boranes: A type of boron hydride with a fully closed, polyhedral structure where all boron atoms are fully bonded to each other and to hydrogen atoms.

Arachno-boranes: Boranes with an open framework structure where some vertices of the polyhedron are missing, leading to varying numbers of hydrogen atoms.

Boron clusters: Molecules consisting of multiple boron atoms that can form complex structures, including nido-, closo-, and arachno-boranes, exhibiting unique bonding and properties.