Question

write the coordination number and oxidation state of platinum in [pt(en)2cl2]

Answer 1

Platinum is a very rare silver-white metallic precious element. It has an abundance in the Earth's crust of roughly 0.004 ppm, ranking it among the least abundant elements on Earth.

Platinum has been found in Egyptian artifacts as old as 700 BC and was used in jewelry in Central and South America at least as early as the 1500s. But the Spanish explorer and scientist Antonio de Ulloa is credited with its discovery in 1735 in Colombia.

The name "platinum" comes from the Spanish word platina meaning "little silver." It was intended with a negative connotation: it made mining for gold more complicated as its melting temperature was too high to be easily melted away.

Properties of Platinum

Platinum has several key properties that make it a great metal to work with.

Platinum is ductile, meaning it can be drawn into wire while maintaining toughness and flexibility and without becoming brittle.

Platinum is malleable, meaning it can be reshaped and easily worked with without breaking. It can be alloyed with iridium or rhodium to become stronger and harder while maintaining the benefits of pure platinum.

Platinum is a lustrous (shiny), silvery-white metal and is highly resistant to corrosion and oxidation in moist air and does not tarnish or rust. Additionally, it is fairly resistant to deterioration by acids. It remains bright in appearance even after heating to high temperatures. Since it is so unreactive and stable, it is considered a noble metal. It can only be dissolved in fused alkalis or aqua regia (a mixture of nitric acid and hydrochloric acid that translates in Latin to "royal water").

Platinum has a relatively high melting
temperature, roughly 1768.2°C or 3214.8°F

Platinum has catalytic properties, meaning it helps speed up chemical reactions, without being affected itself.


Hope this question's answer are helpful
and press the point of thanks

Answer 2

Answer: The coordination no is 6 and oxidation state is +2.

Explanation: The coordination number is the number of atoms directly bonded to the central atom. en is a bidentate ligand as it bonds through two nitrogen atoms. Cl is a monodentate ligand.

en is ethylene diamine which is a neutral ligand and thus the oxidation state is zero. Chlorine has an oxidation number of -1. Thus the Oxidation state of Platinum is +2.

If oxidation state of Platinum is x:

x+0(2)+2(-1)=0

x = +2.