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Coordination Number and Geometry

Coordination Number and Geometry

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.

Cytoskeletal Coordination in Cell Migration

Cytoskeletal Coordination in Cell Migration

A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...

Structural Isomerism

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...

Lattice Centering and Coordination Number

Lattice Centering and Coordination Number

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...

Stereoisomerism

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...

Coordination Compounds and Nomenclature

Coordination Compounds and Nomenclature

In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...

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Related Experiment Video

Updated: Mar 9, 2026

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

Published on: July 17, 2021

Organizing and Reorganizing Coordination Patterns.

Rajiv Ranganathan¹, Robert A Scheidt²

¹Department of Kinesiology, Michigan State, 203 IM Circle, East Lansing, Michigan, 48824, USA.

Advances in Experimental Medicine and Biology

|December 31, 2016

Summary

This summary is machine-generated.

Movement neuroscience explores how the brain learns new coordination patterns for goal-directed movement. A novel body-machine interface (BoMI) aids in studying this motor learning process.

Keywords:

Body–machine interface (BoMI)Glove-cursor task Motor learning Muscle synergies Null space Principal component (PC)Redundant movements Task space

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Last Updated: Mar 9, 2026

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Area of Science:

Motor Neuroscience
Motor Learning
Rehabilitation

Background:

Understanding goal-directed movement coordination is key in neuroscience and rehabilitation.
Limited research exists on acquiring novel coordination patterns compared to refining existing ones.
Studying new coordination pattern acquisition presents challenges in motor neuroscience.

Purpose of the Study:

To address the gap in understanding how new motor coordination patterns are acquired and refined.
To introduce and utilize a novel experimental paradigm for studying motor learning.
To investigate the organization and reorganization of coordination with practice.

Main Methods:

Development and application of a novel experimental paradigm: the body-machine interface (BoMI).
BoMI combines control of high degrees of freedom with a linear mapping.
Systematic examination of coordination in high-dimensional spaces.

Main Results:

The BoMI paradigm facilitates systematic study of high-dimensional motor control.
New insights into the learning of high-dimensional spaces were gained.
Understanding of generalization and transfer in motor learning was advanced.

Conclusions:

The BoMI paradigm is effective for studying the acquisition of novel motor coordination.
This research provides valuable insights into fundamental aspects of motor learning.
Findings have implications for movement rehabilitation strategies.