US3975416A
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Preparation of yttrium and lanthanide hexafluoroisopropoxide diammoniates
Assignee: United States Department of the Air Force
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Filing: 1973-09-06
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Granted: 1976-08-17
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Expires: 1993-09-06
Abstract
Abstract Yttrium and rare earth metal hexafluoroisopropoxide diammoniates are prepared by reacting yttrium and rare earth metal chlorides with 1,1,1,3,3,3-hexafluoroisopropanol in the presence of anhydrous ammonia. The compounds are useful as catalysts for organic and polymerization reactions, as dopants for semi-conductor devices, and in preparing thin film coatings.
Inventors
- 👤 Khodabakhsh S. Mazdiyasni
- 👤 Barbara J. Schaper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:38
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/34; C07C31/38; C07C29/00; C07C29/68; C07C29/70; C07F; C07F5/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
A process for preparing yttrium and lanthanide hexafluoroisopropoxide diammoniates which comprises reacting anhydrous yttrium chloride or an anhydrous lanthanide chloride with 1,1,1,-3,3,3-hexafluoroisopropanol in the presence of anhydrous ammonia, the reaction being conducted at a temperature in the range of zero to 5°C in a reaction medium consisting essentially of diethyl ether.
Claim 2
Dependent Claim
51 words
A process for preparing yttrium and lanthanide hexafluoroisopropoxide diammoniates which comprises reacting anhydrous yttrium chloride or an anhydrous lanthanide chloride with 1,1,1,-3,3,3-hexafluoroisopropanol in the presence of anhydrous ammonia, the reaction being conducted at a temperature in the range of zero to 5°C in a reaction medium consisting essentially of diethyl ether.
Claim 3
Dependent Claim
28 words
The process according to claim 1 in which the yttrium chloride or lanthanide chloride is reacted with 1,1,1,3,3,3-hexafluoroisopropanol in stoichiometric amounts using a molar excess of anhydrous ammonia.
Claim 4
Dependent Claim
24 words
The process according to claim 2 in which a molar excess of anhydrous ammonia in the range of 20 to 100 percent is used.
Claim 5
Dependent Claim
40 words
The process according to claim 2 in which the diammoniate is separated from the resulting reaction mixture; the separated diammoniate is dissolved in 1,1,1,3,3,3-hexafluoroisopropanol; and the solution obtained is cooled, thereby causing the diammoniate to recrystallize as a purified product.
Claim 6
Dependent Claim
30 words
The process according to claim 2 in which the lanthanide chloride is a chloride of lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysposium, holmium, erbium, thulium, ytterbium or lutetium.
Claim 7
Dependent Claim
54 words
As a new composition of matter, a compound having the following formula: M[OCH(CF.sub.3).sub.2 ].sub.n.2NH.sub.3, wherein M is an element selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysposium, holmium, erbium, thulium, ytterbium, and lutetium, and n is a numeral equal to the valence of the element M.
Claim 8
Dependent Claim
54 words
As a new composition of matter, a compound having the following formula: M[OCH(CF.sub.3).sub.2 ].sub.n.2NH.sub.3, wherein M is an element selected from the group consisting of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysposium, holmium, erbium, thulium, ytterbium, and lutetium, and n is a numeral equal to the valence of the element M.
Claim 9
Dependent Claim
16 words
The composition of claim 6 in which M is yttrium and n is equal to 3.
Claim 10
Dependent Claim
16 words
The composition of claim 6 in which M is lanthanum and n is equal to 3.
Claim 11
Dependent Claim
16 words
The composition of claim 6 in which M is ytterbium and n is equal to 3.
Claim 12
Dependent Claim
16 words
The composition of claim 6 in which M is lutetium and n is equal to 3.
Claim 13
Dependent Claim
16 words
The composition of claim 6 in which M is praseodymium and n is equal to 3.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |