Gamma radiation effects on polyimide-passivated n+p diodes

Ang, Simon S.; Brown, W.D.; Le, Huayong; Ulrich, Richard K.

doi:10.1016/0038-1101(90)90073-n

Cited by 5 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A recent, very promising approach, the reductive carbonylation in liquid SbF 5 , is found to be successful in the synthesis of the congeners [M(CO) 6 ][Sb 2 F 11 ] 2 , M = Ru or Os, from the corresponding fluorosulfates, M(SO 3 F) 3 , according to But the method fails for FeX 3 (X = Cl or SO 3 F), and polymeric Fe[SbF 6 ] 2 , which has a layer structure, is formed instead.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂

1997

View full text Add to dashboard Cite

Oxidative carbonylation of Fe(CO) 5 in liquid SbF 5 and a CO atmosphere, with either AsF 5 or Cl 2 as external oxidizing agents, produces [Fe(CO) 6 ][Sb 2 F 11 ] 2 in very high yield. The resulting off-white solid material is thermally stable (above 200°C). The homoleptic carbonyl cation [Fe(CO) 6 ] 2+ , the first of its type formed by a 3d-metal, is isostructural with [Ru(CO) 6 ] 2+ and [Os(CO) 6 ] 2+ which are obtained by reductive carbonylation of M(SO 3 F) 3 , M ) Ru or Os. The stretching force constant of 19.82 × 10 2 N m -1 and ν j(CO) av of 2215.5 cm -1 suggest significantly reduced π-back-bonding. The single line 57 Fe Mössbauer spectrum at δ ) -0.001(6) mm s -1 relative to R-Fe is consistent with a regular octahedral structure and a 1 A 1g groundstate for [Fe(CO) 6 ] 2+ . The possible existence of [Fe(CO) 6 ] 3+ formed by oxidation with Cl 2 is discussed.

show abstract

Section: Resultsmentioning

confidence: 99%

“…(a) Chemicals. Antimony(V) fluoride was obtained from AtoChem, North America, and purified by repeated distillation as described by us. , Fe(CO) 5 was obtained from BASF (purity not stated) and used without further purification. Cl 2 (Baker Chemiekalien Gross-Gerau) and SO 2 (Matheson, Europe) were obtained from commercial sources.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂

1997

View full text Add to dashboard Cite

show abstract

“…Reductive Carbonylation Reductive carbonylation (method A) of metal fluorosulfates and fluorides is both elegant and versatile. The byproducts COF 2 , CO 2 , and S 2 O 5 F 2 and the solvolysis product identified as Sb 2 F 9 (SO 3 F) , are sufficiently volatile and will not interfere in the product isolation. This is not the case with metal chlorides, where in addition to COCl 2 a mixed fluoride−chloride of antimony(V) forms, which has limited volatility .…”

Section: Discussionmentioning

confidence: 99%

σ-Bonded Metal Carbonyl Cations and Their Derivatives: Syntheses and Structural, Spectroscopic, and Bonding Principles

Willner

Aubke

2003

Organometallics

View full text Add to dashboard Cite

Homoleptic σ-bonded metal carbonyl cations (σ-carbonyls) and their derivatives have grown in recent years into a large subgroup of mononuclear metal carbonyl complexes. They are at present formed by 17 elements, including the post transition metal mercury. Most are generated in superacids: the Lewis superacid SbF 5 and the conjugate Brønsted-Lewis superacid HF-SbF 5 . Thermally stable salts are formed with the superacid anions [Sb 2 F 11 ] -and [SbF 6 ] -. Many of the cations are superelectrophilic, with metals in oxidation states of +2 or +3. Three different synthetic routes are developed: reductive (A) or solvolytic carbonylations (B) and oxidative methods (C). Considerable progress has been made by replacing the Lewis superacid SbF 5 as reaction medium by the conjugate Brønsted-Lewis superacid HF-SbF 5 . This allows reactions to proceed faster in a homogeneous phase and to produce crystalline materials. In total 27 mostly recent molecular structures have been obtained, including that of [Ir(CO) 6 ][SbF 6 ] 3 ‚4HF, the first HF solvate with one of the HF molecules coordinated in an isotridentate mode to three carbon atoms of the cation. Due to the electrophilic nature of the carbonyl carbon in fluoroantimonate salts of metal carbonyl cations, extended structures are formed via significant interionic C---F contacts. A new σ-bonded carbonyl, (CF 3 ) 3 BCO, which has been fully characterized, expands the existence range of metal carbonyl cations to group 13. The large amount of spectroscopic and structural information accumulated is used to present a conceptually simple bonding model.

show abstract

“…11,12 Aubke has reported that dissolution of simple transition metal salts in the neat Lewis superacid SbF 5 in the presence of CO leads to Xabstraction and the formation of novel polycarbonyl polycations such as Pt(CO) 4 2+ , Ir(CO) 6 3+ , and Fe(CO) 6 2+ with Sb 2 F 11counteranions. 8,13 Treatment of the donor phosphine complex (dmpe)Pt(Me) 2 with SbF 5 at 20 °C does not afford any identifiable soluble products. In contrast, both (dfepe)Pt(Me) 2 and (dfepe)Pt(OTf) 2 dissolve readily in SbF 5 and cleanly generate a common (dfepe)Pt(X) 2 solution species 4 exhibiting a single 31 P NMR resonance at δ 65.0 ( 1 J PtP ) 4530 Hz) (Scheme 1).…”

mentioning

confidence: 99%

“…The value of ν-(CO) ave (2229 cm -1 ) for this nonclassical 17 dicarbonyl dication is intermediate between ν(CO) ave reported for the neutral Pt(II) complex (FSO 3 ) 2 Pt(CO) 2 (2202 cm -1 ) and the tetracarbonyl dication, Pt(CO) 4 2+ (2261 cm -1 ). 8d,18 The electron-poor nature of 2 is further reflected by the unusually high-field 13 C NMR carbonyl resonance at δ 152.6, which appears as a doublet due to coupling to the trans phosphorus ( 2 J PC ) 132 Hz). 19 Taken together, the platinum carbonylation data in HOTf, FSO 3 H, and SbF 5 are in accord with a relative anion lability ordering Sb 2 F 11 > SO 3 F -> OTf -.…”

mentioning

confidence: 99%

Organometallics in Superacidic Media: Generation of Highly Electrophilic (Fluoroalkyl)phosphine Pt(II) Cationic Complexes

Houlis

Roddick

1998

J. Am. Chem. Soc.

View full text Add to dashboard Cite

The chemistry of highly electrophilic late transition metal centers has received increasing attention in recent years. 1 In the context of "Shilov chemistry", the involvement of cationic Pt(II) centers in hydrocarbon activation has been recently demonstrated by several groups for L 2 Pt(R)X systems. 2,3 A key for electrophilic group 10 studies has been the use of weakly coordinating anions such as B[3,5-C 6 H 3 (CF 3 ) 2 ] 4 -and MeB(C 6 F 5 ) 3 -, which allows the incipient generation of reactive 14-electron metal centers. [2][3][4] Several years ago we reported the synthesis of very electronpoor (perfluoroalkyl)phosphine complexes (dfepe)Pt(Me)X (dfepe ) (C 2 F 5 ) 2 PCH 2 CH 2 P(C 2 F 5 ) 2 ; X ) O 2 CCF 3 , OTf, SO 3 H). 5 While these systems could, in principle, afford an extremely electrophilic (dfepe)Pt(Me) + moiety, simple anion dissociation is greatly disfavored, and ligand association reactions to form (dfepe)Pt(Me)(L) + products are not observed. 6 A different approach was suggested by the unusual stabilities of (dfepe)Pt(Me)X and (dfepe)Pt(X) 2 compounds in the protic superacids CF 3 SO 3 H and FSO 3 H, 5,7 together with Aubke's novel syntheses of unusual cationic metal polycarbonyl complexes, M(CO) n m+ , which exploit the inherently low nucleophilicity of superacidic media. 8,9 In this report we show that well-defined (dfepe)Pt(II) coordination compounds with accessible coordination sites may be generated in superacidic solvent systems, the utility of SbF 5 (SO 2 ) as a stoichiometric reagent for the generation of weakly associated L n M + [(X)(SbF 5 ) n ] -organometallics, and some initial observations regarding the stabilization of transition metalcarbon bonds in superacidic media.(dfepe)Pt(X) 2 (X ) OTf, FSO 3 ) complexes have very limited solubilities in aprotic solvents and do not react with CO. In fluorosulfonic acid, however, treatment of (dfepe)Pt(FSO 3 ) 2 with 1 atm CO cleanly generates a cationic monocarbonyl product [(dfepe)Pt(CO)(FSO 3 )] + (1) (ν(CO) ) 2214 cm -1 ) (eq 1). Under higher pressures of CO (>40 psi), the reversible appearance of an additional single 31 P resonance and two new ν(CO) bands at 2235 and 2222 cm -1 are attributed to generation of [(dfepe)Pt-(CO) 2 ] 2+ (2). In triflic acid, only [(dfepe)Pt(CO)(OTf)] + (3) (ν-(CO) ) 2210 cm -1 ) is observed under these conditions. 10 Both 1 and 3 in the absence of CO only slowly revert to (dfepe)Pt(X) 2 at 20°C over several days. This acid-dependent carbonylation behavior has been previously attributed to the formation of more weakly coordinating hydrogen-bonded anion aggregates, X(HX) n -. 11,12 Aubke has reported that dissolution of simple transition metal salts in the neat Lewis superacid SbF 5 in the presence of CO leads to X -abstraction and the formation of novel polycarbonyl polycations such as Pt(CO) 4 2+ , Ir(CO) 6 3+ , and Fe(CO) 6 2+ with Sb 2 F 11 -counteranions. 8,13 Treatment of the donor phosphine complex (dmpe)Pt(Me) 2 with SbF 5 at 20°C does not afford any identifiable soluble products. In contrast, both (d...

show abstract

Gamma radiation effects on polyimide-passivated n+p diodes

Cited by 5 publications

References 6 publications

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂

σ-Bonded Metal Carbonyl Cations and Their Derivatives: Syntheses and Structural, Spectroscopic, and Bonding Principles

Organometallics in Superacidic Media: Generation of Highly Electrophilic (Fluoroalkyl)phosphine Pt(II) Cationic Complexes

Contact Info

Product

Resources

About

Gamma radiation effects on polyimide-passivated n+p diodes

Cited by 5 publications

References 6 publications

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)6][Sb2F11]2

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)6][Sb2F11]2

σ-Bonded Metal Carbonyl Cations and Their Derivatives: Syntheses and Structural, Spectroscopic, and Bonding Principles

Organometallics in Superacidic Media: Generation of Highly Electrophilic (Fluoroalkyl)phosphine Pt(II) Cationic Complexes

Contact Info

Product

Resources

About

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂

Synthesis and Spectroscopic Characterization of Hexakis(carbonyl)iron(II) Undecafluorodiantimonate(V), [Fe(CO)₆][Sb₂F₁₁]₂