Inorganic chemistry

Some things are not made of life.

These things are called inorganic. They are in the ground as minerals. They are also in the air.

Some of them help our bodies work. They can even help us make food for plants. We use them to make tools and medicines. These tiny parts are all around us.

They make our world work.

Inorganic chemistry is the study of things that are not carbon-based.

Most organic chemistry looks at life-based things. But inorganic chemistry looks at much more. Many inorganic compounds are found in nature as minerals. For example, you might find gypsum in the ground.

These compounds also help living things. They can be part of our DNA. Some help our bodies move energy.

Scientists study many different types. One group is called organometallic chemistry. This looks at compounds with metal-carbon bonds. Another group is bioinorganic chemistry. This studies how metals work in living things.

For example, iron helps our blood work.

Inorganic chemistry is very useful for industry. People use it to make cement. It is also used to make fertilizer for farms. Some materials are used to make tiny computer chips.

These chips are part of solid state chemistry. This field studies how large groups of atoms act together. Many inorganic things are also colorful or magnetic. This helps scientists learn about them.

Inorganic chemistry is a huge field of science. It studies compounds that are not based on carbon. This makes it different from organic chemistry.

Many of these substances are found in nature as minerals. You might find pyrite or gypsum in the soil.

These compounds also help living things work every day. They act as electrolytes or help store energy in our bodies. Even the backbone of our DNA uses inorganic phosphates to stay together.

These substances work in many different ways through chemical bonding. Some are ionic compounds made of simple parts called cations and anions.

For example, magnesium chloride is made of magnesium cations and chloride anions. Other compounds are highly covalent, like sulfur dioxide. Some have polar covalent bonding, which is a middle ground between the two. Many inorganic compounds also have very high melting points. Some salts, like sodium chloride, dissolve very easily in water.

Scientists have studied these materials for a long time. In the early 1800s, Lavoisier and Priestley did experiments on oxygen. Their work helped people understand how gases react.

Later, in the early 1900s, Carl Bosch and Fritz Haber changed the world. They found a way to make ammonia using iron catalysts. This process is called the Haber process. It showed how much inorganic chemistry could help people.

There are many specific branches of this science to explore. Organometallic chemistry looks at compounds with metal-carbon bonds.

Bioinorganic chemistry studies how metals work inside living things. For instance, iron is a key part of hemoglobin in our blood.

Another branch is solid state chemistry, which studies materials like silicon chips. Cluster chemistry looks at groups of atoms bonded in triangles.

These clusters are like a bridge between tiny molecules and solid objects.

Inorganic chemistry is very useful in our daily lives. It helps the chemical industry make many important things. For example, it is used to create fertilizers like ammonium nitrate. It is also used to make portland cement for building.

Some inorganic compounds are used as catalysts to speed up reactions. Many of these substances are also very colorful or magnetic. Scientists use these bright colors and magnetic pulls to learn about them.

Inorganic chemistry is the study of the synthesis and behavior of inorganic and organometallic compounds. This field focuses on chemical substances that are not based on carbon. This distinguishes it from organic chemistry, though the two fields overlap in organometallic chemistry. Inorganic compounds are essential to both the natural world and human industry. They appear in nature as minerals like pyrite or gypsum. They also function as vital biomolecules. For example, electrolytes like sodium chloride help biological systems, and ATP stores energy. Even the polyphosphate backbone of DNA is an inorganic structure.

Chemical bonding in inorganic compounds varies significantly. Some are ionic compounds, which consist of cations and anions joined by ionic bonding. An example is magnesium chloride, made of magnesium cations and chloride anions. Other compounds are highly covalent, such as sulfur dioxide. Many others feature polar covalent bonding, which is an intermediate state between ionic and covalent. These compounds often have high melting points. Some salts, like sodium chloride, are highly soluble in water. Additionally, acid-base chemistry can occur when a reactant contains hydrogen atoms. In this context, a Lewis acid is any species that can bind to electron pairs. A Lewis base is a molecule that tends to donate an electron pair.

Coordination chemistry is a major subdivision of this field. It involves coordination compounds where metals are bound to ligands. In classical versions, metals bind to lone pairs of electrons on atoms like water or ammonia. Modern coordination chemistry uses almost all organic and inorganic compounds as ligands. The metals involved are often from groups 3 through 13 or the lanthanides and actinides. These complexes show diverse structures, such as tetrahedral, square planar, or octahedral shapes. For example, cobalt complexes can be octahedral.

A famous example is the iron in hemoglobin, which is biologically essential.

Main group chemistry focuses on elements from groups I through VII and group 0. This excludes hydrogen but may include elements like scandium or zinc. These compounds have been known since the beginning of chemistry. For instance, early scientists studied elemental sulfur and white phosphorus. Lavoisier and Priestley performed experiments on oxygen, which helped define stoichiometric ratios in reactions.

Another major milestone occurred in the early 1900s. Carl Bosch and Fritz Haber developed a way to synthesize ammonia using iron catalysts. This process, known as the Haber process, had a massive impact on mankind. It demonstrated the power of inorganic chemical synthesis.

Organometallic chemistry specifically studies compounds containing metal-carbon bonds. This area is important because organic ligands are often sensitive to oxidation or hydrolysis. This requires specialized preparation methods compared to traditional complexes. Organometallic chemistry is highly relevant to industry because many ligands are petrochemicals.

This field also includes metal carbonyls and metal alkoxides. These compounds are vital for organic synthesis, where organometallic catalysts are frequently used as reagents.

Cluster chemistry involves groups of atoms bonded together, often in triangular sets. These clusters exist in pure inorganic systems, organometallic chemistry, and bioinorganic chemistry.

Large clusters act as an intermediate between a single molecule and a bulk solid. This interface is the basis for nanoscience and nanotechnology. One example is the study of quantum size effects in cadmium selenide clusters.

In biology, iron-sulfur clusters are central components of proteins used in human metabolism.

Inorganic chemistry is also highly practical for the global economy. Traditionally, a nation's productivity could be measured by its production of sulfuric acid. Man-made compounds like ammonium nitrate are essential for fertilizer. The Haber process produces the ammonia needed for this. Other large-scale materials include portland cement. Inorganic compounds also serve as catalysts, such as vanadium(V) oxide or titanium(III) chloride. Furthermore, solid state chemistry studies materials like silicon chips or superconductors.

Finally, many inorganic compounds are magnetic or colored, which helps scientists understand their structure through spectroscopy.