Twist-boat Conformation
Twist-boat Conformation - Related Videos
01:20
Conformity
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2020
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group. Asch’s Original Study Solomon Asch conducted several experiments in the 1950s to determine how people are affected by the thoughts and behaviors of other people. In one study, a group of participants was shown a series of printed line segments of different lengths: a, b, and c. Participants were then shown a fourth line segment: x. They were asked to identify which...
11:41
Magnetic Tweezers for the Measurement of Twist and Torque
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Cited by 16 •
2014
Magnetic tweezers, a powerful single-molecule manipulation technique, can be adapted for the direct measurements of the twist (using a configuration called freely-orbiting magnetic tweezers) and torque (using a configuration termed magnetic torque tweezers) in biological macromolecules. Guidelines for performing such measurements are given, including applications to the study of DNA and associated nucleo-protein filaments.
08:55
A Minority of One: Conformity to Group Norms
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2023
Source: William Brady & Jay Van Bavel—New York University It is obvious that we are influenced by those around us, but in the early to mid 1900's, psychologists began to study how potent social influence can be on our thoughts and behaviors. Motivated in part by attempts to explain the behaviors of Nazi soldiers in World War II, one topic of considerable interest at the time in psychology was conformity, the phenomenon in which people match their attitudes, behaviors, or beliefs to group...
01:13
Angle of Twist: Problem Solving
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2024
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque exerted...
10:37
Spatial Separation of Molecular Conformers and Clusters
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Cited by 3 •
2014
We present a technique that allows the spatial separation of different conformers or clusters present in a molecular beam. An electrostatic deflector is used to separate species by their mass-to-dipole moment ratio, leading to the production of gas-phase ensembles of a single conformer or cluster stoichiometry.
FAQs
Twisting the ring changes the relative orientation of its atoms, which reduces eclipsing interactions and flagpole repulsion compared with the idealized boat arrangement. This partial relief of strain makes the twisted form energetically more favorable than an untwisted boat. However, the improvement is incomplete because other torsional and steric strains remain.
Residual torsional and steric strain keeps the twist-boat conformation higher in energy than the chair conformation. Although twisting relieves some unfavorable contacts associated with the boat geometry, it does not remove all strain from the ring. This energy difference explains why the chair form generally represents the more stable conformational arrangement of cyclohexane.
The twist-boat conformation represents one arrangement within the changing energy landscape of cyclohexane. Its strained geometry helps connect different ring shapes during conformational interconversion rather than serving only as a static structure. Considering this form allows conformational analysis to account for changes in energy as the ring puckers, twists, and adopts alternative arrangements.
Chemists compare the arrangement of the ring, the degree of puckering and twisting, and the strain associated with each geometry. In particular, they assess whether eclipsing interactions, flagpole repulsion, torsional strain, and steric strain have been reduced or retained. These comparisons support predictions of relative stability without treating every nonplanar conformation as equally favorable.
Substituted rings can adopt conformations whose molecular shapes affect their relative stability. Examining a twist-boat arrangement alongside other possible forms helps researchers evaluate how ring conformation changes the three-dimensional placement of substituents and the overall energy of the molecule. This analysis supports more informed predictions about conformational preferences in substituted cyclohexane systems.
A ring’s three-dimensional conformation determines the spatial arrangement of its atoms and substituents. Studying twist-boat geometry therefore helps connect conformational changes with stereochemical relationships and possible differences in chemical reactivity. The approach is especially useful when comparing alternative shapes, because relative stability and molecular shape can influence how a cyclohexane derivative behaves.