Nitrosyl and dioxygenyl cations and their salts—Similar but further investigation needed

Thermolabile Noble Metal Precursors: (NO)[Au(NO3)4], (NO)2[Pd(NO3)4], and (NO)2[Pt(NO3)6]

“…Charge balance is achieved by the NO + cations, which have a typical NÀO distance of 109.4 pm. [20] The structure of the anionic complex [Au(NO 3 4 ] is nearly identical to its palladium analogue. The thermal decomposition of the complex noble metal nitrates as monitored by differential thermal analysis (DTA)/ thermogravimetric analysis (TG) measurements show that the metals form in any case.…”

Metal Oxidation with N2O5: The Nitrosylium Nitrates (NO)Cu(NO3)3, (NO)2[Zn­(NO3)4] and (NO)6[Ni4(NO3)12](NO3)2·(HNO3)

“…The distance between the nitrogen and oxygen atoms within the nitrosylium ion is 104.7(4) pm. The formation of (NO) 6 5) to 210.0(5) pm, the distortion of the octahedra is especially significant for the O-Ni-O angles involving those oxygen atoms belonging to the chelating nitrate groups (O11, O12, O21, O22, O31, O32, O41, O42), which were found to be between 62.2(2) and 63.2(2)°. The nitrate ions that are bonded in a monodentate fashion can be divided into two categories according to their connectivity modes: two of the four anions act as monodentate bridging ions and lead to a linkage of two [NiO 6 ] octahedrons to form a dimer (Figure 5).…”

“…[6] The zinc nitrate (NO) 2 [Zn(NO 3 ) 4 ] crystallizes in the orthorhombic crystal system with the non-centrosymmetric space group Fdd2 and with eight formula units in the unit cell ( Figure 3). In contrast to the copper compound, in (NO) 2 4 ].…”

“…The thermal decomposition of the complexes leads to a mixture of Cu + Cu 2 O and ZnO, respectively. We were also able to obtain the unique complex nitrate (NO) 6 …”

“…In the reaction of the metal with N 2 O 5 , the nickel nitrate (NO) 6 [Ni 4 (NO 3 ) 12 ](NO 3 ) 2 · (HNO 3 ) is formed instead of the expected copper and zinc congener (NO) n [Ni(NO 3 ) 2+n ], clearly due to a slight contamination of the reaction mixture with water.…”