Nitrosolate und verwandte Verbindungen, XII Nitrosolatokomplexe von Silber(I) / Nitrosolates and Related Compounds, XII Nitrosolato Complexes of Silver(I)

Olbrich, Falk; Zimmer, Bärbel; Kastner, Michael; Schlabrendorff, C. Von; Vetter, Gottlieb; Klar, G.

doi:10.1515/znb-1992-1111

Cited by 9 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ag(2)−Ag(2) distance is 3.157(4) Å, noticeably less than the 3.224(3)-Å Ag + −Ag + distance found in a similar structure in which some reduction of Ag + had occurred . It is just a little longer than the distances ranging from 2.655(2) to 3.058(1) Å that have been reported for Ag + −Ag + interactions in seven organic complexes of AgNO 3 . − This indicates that a weak Ag + −Ag + interaction occurs in 12 of the 16 D6Rs per unit cell of this crystal. The Ag + ions at Ag(2) do not extend away from their D6Rs to avoid a Ag + −Ag + repulsion (see Figure ).…”

Section: Discussionmentioning

confidence: 72%

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form

2003

View full text Add to dashboard Cite

Two crystal structures of fully dehydrated, fully Ag + -exchanged zeolite X have been determined by singlecrystal X-ray diffraction techniques. Ion exchange was accomplished by allowing 0.05 M aqueous AgNO 3 to flow past each crystal for 3 days to give hydrated Ag 92 Si 100 Al 92 O 384 . One crystal was dehydrated at 400 °C for 2 days, followed by cooling to 21 °C, all in a flowing stream of dry oxygen gas (790 Torr), followed by evacuation at 2 × 10 -6 Torr for 20 min. The structure was determined in the cubic space group Fd3 hm (a ) 25.177(4) Å) and was refined to the final error indices R 1 ) 0.048 and R 2 ) 0.078 with 291 reflections for which I > 3σ(I). The second crystal (a ) 24.871(4) Å) was similarly dehydrated without oxygen. Its structure was determined in Fd3 h and refined to R 1 ) 0.069 and R 2 ) 0.072 with 320 reflections as above. In the first crystal, 4 Ag + ions were found at the octahedral site I (Ag + -O ) 2.689(7) Å) and 24 Ag + ions occupy the nearby site I′ positions (Ag + -O ) 2.220(10) Å), avoiding I-I′ contacts. Thirty-two Ag + ions fill site II (Ag + -O ) 2.360(10) Å), and the remaining 32 Ag + ions occupy a III′ site (Ag + -O ) 2.368(12) and 2.586(15) Å). No reduction of Ag + has occurred. In the second crystal, 16 Ag + ions fill site I (Ag + -O ) 2.573(10) Å), 32 partially reduced Ag + ions half fill two different site I′ positions that are unusually deep in the sodalite cavities (Ag-O ) 2.628(10) and 2.708(14) Å), and 16 Ag + ions half fill the 32-fold site II′ inside the sodalite cavity (Ag + -O ) 2.461(11) Å). Sixteen Ag + ions half fill the 32-fold site II (Ag + -O ) 2.231(11) Å), and eight Ag + ions lie at two different III′ sites. In total, only about 86 silver atoms or ions were found per unit cell of crystal 2. The remaining six have migrated out of the zeolite framework to form small silver crystallites on the surface of the zeolite single crystal. In this structure, each sodalite cavity hosts a cationic silver cluster. In half, eight silver atoms form interpenetrating tetrahedra, Ag 8 n+ , with T d symmetry. The other half host cyclo-Ag 4 m+ cations with near S 4 symmetry. Likely values of n and m are 4 and 2, respectively.

show abstract

Section: Discussionmentioning

confidence: 72%

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form

2003

View full text Add to dashboard Cite

show abstract

“…Metal−Metal interactions are still ambiguous in polynuclear silver(I) compounds. In disilver(I) complexes containing an eight-membered Ag−N−C−N−Ag−N−C−N ring, silver−silver distances between 2.655 and 3.187 Å have been found, − a few of these values being lower than twice the metallic silver radius (2.889 Å). Analogous rings are also known for Cu(I) ,, and Au(I)…”

Section: Introductionmentioning

confidence: 99%

Theoretical Studies of Ag−Ag Closed-Shell Interaction in the Silver(I) Dimer Bis-μ-(5,7-dimethyl[1,2,4]triazolo[1,5-a]pyrimidine) Dinitrato Disilver(I): A RHF and Density Functional Study

1998

View full text Add to dashboard Cite

Calculations on [Ag(NHCHNH)] 2 and [Ag(dmtp)(NO 3 )] 2 complexes have been performed at RHF, DFT (B3LYP), and MP2 levels. Geometry optimizations have been performed on both compounds comparing the result obtained with the different levels of theory and basis set against the available experimental X-ray data. The existence of M‚‚‚M interaction at the different levels has been studied on both complexes using the Bader "Atoms in molecules" methodology.

show abstract

“…As depicted in Figure , the DNM anion is planar like all NO-, NO 2 -, and CN-substituted methanide anions . In principle, three different planar structures of DNM are possible: (i) the anti/anti arrangement (as shown in Figure ), (ii) the syn/anti arrangement, and (iii) the syn/syn arrangement (Figure S4, Supporting Information) 3b. In agreement with the experiment, B3LYP/6-311+G(3df,2p) calculation revealed that the anti/anti form represents the most stable isomer followed by the syn/anti (+7.5 kcal/mol) and the syn/syn isomer (+13.1 kcal/mol).…”

mentioning

confidence: 97%

“…In a series of papers almost a century ago, Wieland described the synthesis of alkali and silver nitrosolates (M[RC(NO) 2 ], M = metal, R = organic substituent) . These nitrosolates can be obtained from unstable N , N ‘-dihydroxyamidines by disproportion in ammonia or by oxidation (KIO 4 ) in basic solution. − For R = H, these procedures result in the formation of, e.g., potassium dinitrosomethanide when potassium hydroxide is used as a base. 1d,2b …”

mentioning

confidence: 99%

See 1 more Smart Citation

Blue Alkali Dinitrosomethanides: Synthesis, Structure, and Bonding

et al. 2005

View full text Add to dashboard Cite

show abstract

Nitrosolate und verwandte Verbindungen, XII Nitrosolatokomplexe von Silber(I) / Nitrosolates and Related Compounds, XII Nitrosolato Complexes of Silver(I)

Cited by 9 publications

References 0 publications

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form

Theoretical Studies of Ag−Ag Closed-Shell Interaction in the Silver(I) Dimer Bis-μ-(5,7-dimethyl[1,2,4]triazolo[1,5-a]pyrimidine) Dinitrato Disilver(I): A RHF and Density Functional Study

Blue Alkali Dinitrosomethanides: Synthesis, Structure, and Bonding

Contact Info

Product

Resources

About

Nitrosolate und verwandte Verbindungen, XII Nitrosolatokomplexe von Silber(I) / Nitrosolates and Related Compounds, XII Nitrosolato Complexes of Silver(I)

Cited by 9 publications

References 0 publications

Two Crystal Structures of Fully Dehydrated, Fully Ag+-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag+ Reduction. Without Oxygen, Ag8n+ (Td) and cyclo-Ag4m+ (near S4) Form

Two Crystal Structures of Fully Dehydrated, Fully Ag+-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag+ Reduction. Without Oxygen, Ag8n+ (Td) and cyclo-Ag4m+ (near S4) Form

Theoretical Studies of Ag−Ag Closed-Shell Interaction in the Silver(I) Dimer Bis-μ-(5,7-dimethyl[1,2,4]triazolo[1,5-a]pyrimidine) Dinitrato Disilver(I): A RHF and Density Functional Study

Blue Alkali Dinitrosomethanides: Synthesis, Structure, and Bonding

Contact Info

Product

Resources

About

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form

Two Crystal Structures of Fully Dehydrated, Fully Ag⁺-Exchanged Zeolite X. Dehydration in Oxygen Prevents Ag⁺ Reduction. Without Oxygen, Ag₈ⁿ⁺ (T_d) and cyclo-Ag₄^m⁺ (near S₄) Form