Диаминдинитритопалладий (II)

Description

Diaminedinitritopalladium(II), known in the industry as palladium "P-salt", is a complex compound of palladium(II) with two ammonia molecules and two nitrite ligands in the coordination sphere. The main purpose of the substance is as a starting solution for the electrolytic deposition of palladium.

Basic Attributes

• CAS No.: 14708-52-2
• Chemical formula: (NH3)2, Pd, (NO2)2
• Molecular Weight: 232.49
• Exact weight: 231.94200
• EU number: 238-388-0
• PSA Specifications: 111.46000
• XLogP3: 1.14900

Scope of application

Diamindinitritopalladium(II) is used as a precursor in cyanide-free solutions for electrolytic palladation - the application of palladium and palladium-nickel coatings to contacts of electronic components, connectors and jewelry, where a wear-resistant coating with low transient resistance is required. The compound also serves as a source of palladium in the synthesis of heterogeneous supported Pd catalysts for hydrogenation and cross-coupling reactions.

Safety Information

As a compound of platinum group metals with nitrite ligands, the substance requires treatment according to the general rules for working with complex palladium salts: the solution is chemically active, can irritate the skin and mucous membranes, and is incompatible with strong reducing agents and flammable materials, contact with which can provoke a violent decomposition reaction of nitrite groups.

Storage and transportation conditions

Store in an airtight container in a cool, dry place, away from reducing agents, acids and flammable materials. When working with electrolytic palladizing solutions, use gloves and safety glasses, ensure ventilation of the work area, and prevent the solution from getting into drains.

Features of palladium electrolytes

Solutions based on diamindinitritopalladium(II) are used to produce both pure palladium coatings and palladium-nickel alloys, which combine the hardness of nickel with the corrosion resistance and low contact resistance of palladium. Such coatings are in demand in the production of connectors and contacts for electronic equipment, where long-term reliability of the electrical connection is required under conditions of multiple cycles of mating and dismembering contacts.

Comparison with platinization

Compared with platinization electrolytes based on the structurally similar diammine dinitroplatinum complex, palladium electrolytes based on diamindinitritopalladium(II) provide a more economical coating due to the lower cost of palladium relative to platinum while maintaining satisfactory electrical and corrosion characteristics for most applications in medium-duty electronics.

Process control of batches of diamindinitritopalladium(II) for electroplating applications includes checking the palladium content and the absence of foreign metal impurities that could degrade the quality and uniformity of the resulting coating during industrial deposition.

More information

In the jewelry industry, palladium coatings based on diamine ditritopalladium(II) are used as a hypoallergenic alternative to nickel coatings, which is especially in demand among consumers with skin sensitivity to nickel.