draw the structure of TMS with its full systematic name, state the reasons for using it and give three reasons why TMS is used in NMR spectroscopy- a level chemistry ocr a

1. Structure and Systematic Name of TMS: TMS stands for Tetramethylsilane. Its systematic name is Silane, tetramethyl-. The structure of TMS is a silicon atom at the center, surrounded by four methyl groups (CH3). Each methyl group is bonded to the silicon atom through a single bond.

2. Reasons for Using TMS: TMS is used as an internal standard in NMR spectroscopy. This is because it has certain properties that make it ideal for this purpose. These include:

   a. It has a single, well-defined peak in the NMR spectrum, which makes it easy to identify.

   b. It is chemically inert, meaning it does not react with the sample being analyzed.

   c. It is volatile, meaning it can easily be removed from the sample after the NMR analysis is complete.

3. Three Reasons Why TMS is Used in NMR Spectroscopy:

   a. Chemical Shift Reference: The peak of TMS is defined as 0 ppm in the NMR spectrum. This serves as a reference point against which all other peaks in the spectrum can be compared.

   b. Solubility: TMS is soluble in a wide range of solvents, making it versatile for use with many different types of samples.

   c. Non-reactivity: As mentioned above, TMS is chemically inert. This means it does not interfere with the sample being analyzed, ensuring that the NMR spectrum obtained is a true representation of the sample.

Please note that I am unable to draw the structure here as this is a text-based platform. However, you can easily find the structure of TMS by doing a quick internet search.