Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Metal-Semiconductor Junctions

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...

Bending of Material: Problem Solving

Bending of Material: Problem Solving

In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...

Steel Manufacturing

Steel Manufacturing

Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...

Structural Steel Products

Structural Steel Products

Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments are...

Steel Fastening Techniques

Steel Fastening Techniques

Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...

Microbial Leaching

Microbial Leaching

Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Kinetic resolution of racemic planar-chiral vinylcymantrenes by molybdenum-catalyzed asymmetric metathesis dimerization.

Beilstein journal of organic chemistry·2026

Same author

High-resolution promoter interaction analysis implicates genes involved in the activation of Type 3 Innate Lymphoid Cells in autoimmune disease risk.

bioRxiv : the preprint server for biology·2026

Same author

Bacterial removal using liposomes and an anionic adsorber.

Journal of bioscience and bioengineering·2024

Same author

Carbon-silicon-switch effect in enantioselective construction of silicon-stereogenic center from silacyclohexadienones.

Nature communications·2024

Same author

Ligand-controlled regiodivergent arylation of aryl(alkyl)alkynes and asymmetric synthesis of axially chiral 9-alkylidene-9,10-dihydroanthracenes.

Nature communications·2024

Same author

Distinctive Chiral Conformations Induced to Poly (naphthalene-1,4-diyl) by Helix-sense-selective Polymerization and Circularly Polarized Light Irradiation.

Chemistry (Weinheim an der Bergstrasse, Germany)·2024

Search research articles

Related Experiment Video

Updated: Jul 19, 2026

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Published on: December 8, 2015

Metathesis route to bridged metallocenes.

Masamichi Ogasawara¹, Takashi Nagano, Tamio Hayashi

¹Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.

Journal of the American Chemical Society

|August 1, 2002

Summary

Researchers synthesized bridged metallocenes using ring-closing metathesis. This method efficiently produced stereoselective dl- or meso-bridged metallocenes with high precision.

Area of Science:

Organometallic Chemistry
Catalysis
Synthetic Organic Chemistry

Background:

Metallocenes are versatile organometallic compounds with applications in catalysis and materials science.
Developing efficient synthetic routes to functionalized metallocenes is crucial for expanding their utility.
Ring-closing metathesis (RCM) offers a powerful tool for constructing cyclic organic structures.

Purpose of the Study:

To develop a general method for synthesizing bridged metallocenes.
To explore the application of RCM for creating novel metallocene architectures.
To achieve diastereoselective synthesis of bridged metallocenes.

Main Methods:

Preparation of 1,1'-diallylmetallocenes of Fe(II), Ru(II), Zr(IV), and Hf(IV).
Interannular ring-closing metathesis reaction using a Ruthenium-carbene catalyst.

More Related Videos

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Published on: May 14, 2016

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

Published on: September 23, 2018

Related Experiment Videos

Last Updated: Jul 19, 2026

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Published on: December 8, 2015

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Published on: May 14, 2016

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

Published on: September 23, 2018

Optimization of reaction conditions for high yield and stereoselectivity.

Main Results:

Successful synthesis of various bridged metallocenes in good yields.
Demonstration of the method's applicability to different metallocene frameworks.
Achieved excellent stereoselectivity in the diastereoselective synthesis of dl- and meso-bridged metallocenes.

Conclusions:

The developed RCM approach provides an efficient route to bridged metallocenes.
The method allows for precise stereochemical control, yielding specific diastereomers.
This work expands the synthetic toolbox for organometallic chemists and catalyst development.