Metal complex................... .pptx

Talk about metal complex

1. Metal Nitrosyl Complexes Md Taiful Islam 19 CHE 077

2. Metal Nitrosyl Complexes Metal nitrosyl complexes are a class of compounds that contain nitric oxide (NO) bonded to a transition metal . These complexes exhibit unique properties and have diverse applications in various fields. Example: Sodium nitroprusside

3. Uniqueness : Stronger Bonds: The metal-NO bond is often stronger than other metal-ligand bonds, leading to increased stability and distinctive reactivity. Versatile Metal Oxidation : NO can exist in different oxidation states (+1, +2, or +3), allowing for electron transfer reactions within the complex. Complex Bonding Combinations: NO can bind to the metal through either the nitrogen or oxygen atom, or even via both atoms in a bridging fashion, resulting in diverse structural possibilities.

4. Properties Color : Metal nitrosyl complexes often exhibit vibrant colors like red , orange , or purple , due to their unique electronic structure and absorption of light in specific wavelengths. Stability : The stability varies depending on the metal and ligand environment. Reactivity : They can be moderately reactive, undergoing ligand substitution reactions or participating in redox processes . Magnetic behavior : Their magnetic properties can vary depending on the metal and NO binding mode. Infrared spectroscopy: Linear M-N-O groups show higher frequencies compared to bent ones.

5. Biomedical applications: Some complexes show promise as nitric oxide donors, potentially aiding in the treatment of cardiovascular formation and hydrogenation . diseases, Cancer, microbial and other conditions. Catalyst: They can be used as catalysts for various reactions, including automobile exhaust. Gas storage and separation: Their ability to bind and release NO selectively makes them potential candidates for gas storage and separation technologies . Sensors and Materials: Some nitrosyl complexes can change their color or electrical properties in response to NO gas, making them potential candidates for NO sensors. Material science Research: They can be used to develop new materials with unique electrical and magnetic properties. Applications

6. { Synthesis:   Many methods can be used for their synthesis, such as Direct reaction with nitric oxide (NO ): Co 2 (CO) 8  + 2 NO → 2 CoNO(CO) 3  + 2 CO 2 ) From Hydroxylamine : K 2 [Ni(CN) 4 ] + 2 NH 2 OH + KOH → K 2 [Ni(CN) 3 )NO] + NH 3  + 2 H 2 O + KCN 3) Reaction with nitric acid (  HNO 3 ): HNO 3  + [Fe( CN ) 6 ] 4-  → [Fe( CN ) 5 (NO)] 2-  + OH −  + OCN −