# What are some examples of inorganic chemistry?

Mar 31, 2016

Inorganic Chemistry is actually quite diverse, and generally covers the chemistry of transition metals (orbital diagrams, mechanisms, spectra, etc) and main group elements, but I can show some pretty cool select images from my textbook too.

GENERAL OVERVIEW

Some things you might learn in Inorganic Chemistry:

• Abundance and elemental form of certain elements in nature
• General rules for polarizability (size and electronegativity, generally), reactivity (Hard-Soft Acid-Base Theory), ionic character (ratio of radii, magnitudes of charge, etc), and so on
• Crystal lattice structures and their general makeup (cubic close-packed, hexagonal close-packed, face-centered cubic, etc)
• Thermochemistry (Hess's Law, hydration and lattice enthalpies, etc)
• Electrochemistry (redox reactions, disproportionation and conproportionation reactions, Pourbaix, Frost, and Latimer diagrams, etc)
• Acid naming and predicting acid strength (oxoacids, hydrohalogenic acids, etc)
• Transition metal complexes and their colorful nature
• Crystal Field Theory ($\pi$ donors, $\sigma$ donors, $\pi$ acceptors, stronger-field/weaker-field ligands, d-orbital splitting diagrams [octahedral, tetrahedral, square planar], etc)

and more!

COOL STUFF IN LATER YEARS

For fun, here's a revolutionary compound called a carbide cluster you might learn about maybe two or three years afterwards.

Some neat aspects:

• Notice how carbon is making more than 4 bonds! (Your guess is as good as mine as to how.)
• There's a bridged $\setminus m a t h b f \left(\text{C"="O}\right)$ on the upper-left part of the compound connected to two $\text{Ru}$ at once. It is interacting with both via its two antibonding ${\pi}^{\text{*}}$ MOs.

Here's a cool titanium sandwich!

• Titanium is actually interacting with all eight carbons at once on the uppermost and lowermost rings.
• Each titanium is likely also interacting with four carbons at once on the central ring (which I'm assuming is an octatetraene ring).

And finally, for some even weirder stuff, here's a "ring-whizzer" mechanism where a compound gives a single $\text{^1 "H}$ $\text{NMR}$ peak at room temperature but multiple peaks at low temperatures:

• It generally happens with cyclic ligands that are bound via only one atom to the transition metal (${\eta}_{1} - {\text{C"_5"H}}_{5}$), where the proton environment keeps changing. At low enough temperatures, this change is detectable, but at high enough temperatures, the signal is an average and we see no peak splitting!
• If the ligand is bound by all of its atoms (such as ${\eta}_{5} - {\text{C"_5"H}}_{5}$ meaning that a cyclopentadiene ring is bound via all 5 carbons), then it's a symmetric bond to the ring, and thus, any "ring-whizzing" retains the same proton environment and no peak splitting is seen.