Privileged Scaffold Hybridization for Rigid Tetracyclic Energetics: Uniting Performance, Stability, and Safety
Sagar Nehe1, Vikas D Ghule2, Srinivas Dharavath1
1Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.
None:
This study underlines the strategic use of privileged scaffold hybridization in designing and synthesizing a unique new class of polynitro energetic compounds. These compounds exhibit high densities (1.77-1.87 g cm-3), high positive heats of formation (652.9-793.3 kJ mol-1), good detonation performance (VOD, 8165-8721 m s-1; DP, 27.38-32.87 GPa), good thermal stability (118-213 °C), and low sensitivity (IS > 7.5 J; FS > 240 N). These findings demonstrate that the fused [5,5,5,6]-tetracyclic backbone in these energetic compounds plays a vital role in achieving excellent energetic performance and stability.
![Solid-phase Synthesis of [4.4] Spirocyclic Oximes](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58508.jpg&w=3840&q=50)
Related Concept Videos
02:30Stability of Substituted Cyclohexanes
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
01:28Stability of Conjugated Dienes
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
01:18Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group...
01:29Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
01:16Cycloaddition Reactions: MO Requirements for Thermal Activation
01:17Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.