chemistry

Thiostannate

Thiostannate is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Thiostannate rather than just read about it. In short: Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen.

Key takeaways

Thiostannate belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Thiostannate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Thiostannate from memory before moving on to harder problems.

Reference excerpt

Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen. Related compounds include the thiosilicates, and thiogermanates, and by varying the chalcogen: selenostannates, and tellurostannates. Oxothiostannates have oxygen in addition to sulfur. Thiostannates can be classed as chalcogenidometalates, thiometallates, chalcogenidotetrelates, thiotetrelates, and chalcogenidostannates. Tin is almost always in the +4 oxidation state in thiostannates, although a couple of mixed sulfides in the +2 state are known, Some thiostannate minerals are known. In nature the tin can be partly replaced by arsenic, germanium, antimony or indium. Many thiostannate minerals contain copper, silver or lead. In the field of mineralogy, these compound can be termed sulfostannates or sulphostannates. Different cluster anions are known: [SnS4]4–, [SnS3]2–, [Sn2S5]2–, [Sn2S6]4–, [Sn2S7]6–, [Sn2S8]2–, [Sn3S7]2–, [Sn4S9]2–, [Sn5S12]4–, or [Sn4S10]4–. The number of sulfur atoms coordinated around the tin atom is most commonly four. However there are also complexes with five or six sulfur atoms surrounding the tin. The behaviour for selenium and tellurium differs as only five selenium or four tellurium atoms can bind to a tin atom. The smaller germanium atom can only accommodate four sulfur atoms. For lead it is hard for it to be in the +4 oxidation state. The SnSn polyhedrons can be standalone in strongly alkaline conditions, or at higher concentrations or less alkaline can condense together. Polyhedra shapes are tetrahedron for four, trigonal bipyramid for five, and octahedron for six sulfur atoms. The polyhedra can be connected at a vertex (corner), or at an edge. Where connected at an edge, four membered rings of -SnSSnS- with internal angles close to 90°. [Sn2S7]6– is corner bridged. Tetrahedra linked by at the corner by a disulfur bridge are unknown. Sn10O4S208- is a supertetrahedron made from 1, 3 and 6 tin atoms connected by oxygen on the interior and sulfur on the surface. For anions with formula SnxSy the condensation ratio c is given by x⁄y. It can vary from 1⁄4 to just below ⁠1/2⁠.

Synthesis The first human production of a thiostannate heated tin oxide with sodium carbonate and sulfur: 2SnO2 + 2Na2CO3 + 9S → 2Na2SnS3 + 2CO2 + 3SO2 Transition metal complexes may be prepared by crystallisation from the ligand solvent. Copper(II) is normally reduced by sulfide S2- in thiostannates to copper(I).

Anions

Reactions Some hydrates are unstable, where water reacts with the sulfide to make hydrogen sulfide gas.

List

References

Worked examples

Example 1 — a first encounter with Thiostannate

Start with the simplest possible case. Write down what Thiostannate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Thiostannate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Thiostannate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Thiostannate

In research: Thiostannate appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Thiostannate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Thiostannate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Sulfides, Tin compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Thiostannate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Thiostannate” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Thiostannate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Thiostannate means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Thiostannate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Thiostannate in simple terms?

Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen.

Why does Thiostannate matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Thiostannate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Thiostannate.