Chelated Borates: Synthesis, Reactivity, and Cation Formation

Pingrong Wei; David A. Atwood

doi:10.1021/ic971595a

Chelated Borates: Synthesis, Reactivity, and Cation Formation

Pingrong Wei, David A. Atwood

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Abstract

The ligands N-salicylidene-o-aminophenol (LH₂), N-(5-chiorosalicylidene)-o-aminophenol (L(Cl)H₂, and N-(5-bromosalicylidene)-o-aminophenol (L(Br)H₂) were used to prepare a series of borates having the formulas LBOR (R = Me (1), Et (2), ⁿPr (3), ⁿBu (4)), L(Cl)BOR (R = Me (5), Et (6), ⁿPr (7), ⁿBu (8)), and L(Br)BOR (R = Me (9), Et (10), ⁿPr (11), ⁿBu (12)). Either 1-4 or 9-12 could be combined with HOSiPh₃, to form unique compounds possessing a single B-O-Si linkage, LBOSiPh₃ (13) and L(Br)BOSiPh₃ (14), respectively. The charged species, [LB(thf)]⁺OTf^- (15) forms when 1 is combined with HOTf. It can be used as a catalyst for the oligomerization of propylene oxide. By comparison, [ⁿBu₂B]⁺OTf^- effects the oligomerization to the same extent as 15, but the neutral species, 1-4, 13, and 14 do not, even under forcing conditions. All of the compounds were characterized by melting point, ¹H NMR, IR, elemental analyses, and, in the case of 13, by X-ray crystallography.

Original language	English
Pages (from-to)	4934-4938
Number of pages	5
Journal	Inorganic Chemistry
Volume	37
Issue number	19
DOIs	https://doi.org/10.1021/ic971595a
State	Published - 1998

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Physical and Theoretical Chemistry
Inorganic Chemistry

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@article{4bde63a3e08f4d1e9a2de1c20d2fe991,

title = "Chelated Borates: Synthesis, Reactivity, and Cation Formation",

abstract = "The ligands N-salicylidene-o-aminophenol (LH2), N-(5-chiorosalicylidene)-o-aminophenol (L(Cl)H2, and N-(5-bromosalicylidene)-o-aminophenol (L(Br)H2) were used to prepare a series of borates having the formulas LBOR (R = Me (1), Et (2), nPr (3), nBu (4)), L(Cl)BOR (R = Me (5), Et (6), nPr (7), nBu (8)), and L(Br)BOR (R = Me (9), Et (10), nPr (11), nBu (12)). Either 1-4 or 9-12 could be combined with HOSiPh3, to form unique compounds possessing a single B-O-Si linkage, LBOSiPh3 (13) and L(Br)BOSiPh3 (14), respectively. The charged species, [LB(thf)]+OTf- (15) forms when 1 is combined with HOTf. It can be used as a catalyst for the oligomerization of propylene oxide. By comparison, [nBu2B]+OTf- effects the oligomerization to the same extent as 15, but the neutral species, 1-4, 13, and 14 do not, even under forcing conditions. All of the compounds were characterized by melting point, 1H NMR, IR, elemental analyses, and, in the case of 13, by X-ray crystallography.",

author = "Pingrong Wei and Atwood, {David A.}",

year = "1998",

doi = "10.1021/ic971595a",

language = "English",

volume = "37",

pages = "4934--4938",

number = "19",

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TY - JOUR

T1 - Chelated Borates

T2 - Synthesis, Reactivity, and Cation Formation

AU - Wei, Pingrong

AU - Atwood, David A.

PY - 1998

Y1 - 1998

N2 - The ligands N-salicylidene-o-aminophenol (LH2), N-(5-chiorosalicylidene)-o-aminophenol (L(Cl)H2, and N-(5-bromosalicylidene)-o-aminophenol (L(Br)H2) were used to prepare a series of borates having the formulas LBOR (R = Me (1), Et (2), nPr (3), nBu (4)), L(Cl)BOR (R = Me (5), Et (6), nPr (7), nBu (8)), and L(Br)BOR (R = Me (9), Et (10), nPr (11), nBu (12)). Either 1-4 or 9-12 could be combined with HOSiPh3, to form unique compounds possessing a single B-O-Si linkage, LBOSiPh3 (13) and L(Br)BOSiPh3 (14), respectively. The charged species, [LB(thf)]+OTf- (15) forms when 1 is combined with HOTf. It can be used as a catalyst for the oligomerization of propylene oxide. By comparison, [nBu2B]+OTf- effects the oligomerization to the same extent as 15, but the neutral species, 1-4, 13, and 14 do not, even under forcing conditions. All of the compounds were characterized by melting point, 1H NMR, IR, elemental analyses, and, in the case of 13, by X-ray crystallography.

AB - The ligands N-salicylidene-o-aminophenol (LH2), N-(5-chiorosalicylidene)-o-aminophenol (L(Cl)H2, and N-(5-bromosalicylidene)-o-aminophenol (L(Br)H2) were used to prepare a series of borates having the formulas LBOR (R = Me (1), Et (2), nPr (3), nBu (4)), L(Cl)BOR (R = Me (5), Et (6), nPr (7), nBu (8)), and L(Br)BOR (R = Me (9), Et (10), nPr (11), nBu (12)). Either 1-4 or 9-12 could be combined with HOSiPh3, to form unique compounds possessing a single B-O-Si linkage, LBOSiPh3 (13) and L(Br)BOSiPh3 (14), respectively. The charged species, [LB(thf)]+OTf- (15) forms when 1 is combined with HOTf. It can be used as a catalyst for the oligomerization of propylene oxide. By comparison, [nBu2B]+OTf- effects the oligomerization to the same extent as 15, but the neutral species, 1-4, 13, and 14 do not, even under forcing conditions. All of the compounds were characterized by melting point, 1H NMR, IR, elemental analyses, and, in the case of 13, by X-ray crystallography.

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JO - Inorganic Chemistry

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Chelated Borates: Synthesis, Reactivity, and Cation Formation

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