Abstract
We have synthesized a series of novel organic S-Fe-CO complexes from the reaction of the sulfur-capped triiron carbonyl cluster [SFe3(CO) 9]2- with the bifunctional propargyl bromide and subsequent reactions. When [SFe3(CO)9]2- was treated with 2 equiv of propargyl bromide in MeCN, three new organo-bridged iron-sulfur carbonyl complexes, [Et4N][Fe3(CO) 9(μ3-η3:η1: η2-CH2C(S)CHC(O))] ([Et4N]-[1]), (μ3-S)Fe3(CO)9(μ3- η1:η2:η1-C(H)=C(CH3)) (2), and Fe2(CO)6(μ2-η1: η2:η1-C(H)=C(CH3CH)) (3), were obtained. The novel anionic acyl cluster 1 is a CO insertion product and can be considered to display a SFe3 core bridged by an allylcarbonyl ligand, H2C=CCHC(O), in μ2-η3:η1 fashion. While cluster 2 can be seen to possess a SFe3 core coordinated with a propyne ligand, CH≡C(CH3), complex 3 exhibits a SFe2 core bridged by a α-methylvinylcarbonyl ligand, C(O)C(CH3)=CH. The anionic cluster 1 could transform to 2 and 3 upon treatment with excess propargyl bromide. When [Et4N][1] was reacted with the oxidizing agent [Cu(MeCN)4][BF4], the neutral diiron complex Fe2(CO)6(μ2- η2:η3-C(O)CHC(S)(CH3)) (4) was obtained as the major product. Complex 4 is seen to possess a SFe2 core linked by a β-methylvinylcarbonyl ligand, C(O)CH=C(CH3). More interestingly, the methylation of the acyl cluster 1 with CF3SO 3Me afforded a unique triiron cluster carbene, Fe3(CO) 9(μ3-η1:η4: η2-CH2C(S)CHC(OCH3)) (5). This paper describes a rare example of the reaction of a sulfur-capped triiron cluster with the bifunctional propargyl bromide and related reactions, in which a new series of iron-sulfur carbonyl complexes coordinated with novel organic fragments results, and the relative stability of some resultant complexes is discussed on the basis of theoretical calculations.
| Original language | English |
|---|---|
| Pages (from-to) | 184-190 |
| Number of pages | 7 |
| Journal | Organometallics |
| Volume | 25 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2006 Jan 2 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
Cite this
Novel types of organic S-Fe-CO complexes : Reaction of [SFe 3(CO)9]2- with propargyl bromide. / Lai, Yun Wen; Cherng, Jiann Jang; Sheu, Wen Shyan; Lee, Gon Ann; Shieh, Minghuey.
In: Organometallics, Vol. 25, No. 1, 02.01.2006, p. 184-190.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Novel types of organic S-Fe-CO complexes
T2 - Reaction of [SFe 3(CO)9]2- with propargyl bromide
AU - Lai, Yun Wen
AU - Cherng, Jiann Jang
AU - Sheu, Wen Shyan
AU - Lee, Gon Ann
AU - Shieh, Minghuey
PY - 2006/1/2
Y1 - 2006/1/2
N2 - We have synthesized a series of novel organic S-Fe-CO complexes from the reaction of the sulfur-capped triiron carbonyl cluster [SFe3(CO) 9]2- with the bifunctional propargyl bromide and subsequent reactions. When [SFe3(CO)9]2- was treated with 2 equiv of propargyl bromide in MeCN, three new organo-bridged iron-sulfur carbonyl complexes, [Et4N][Fe3(CO) 9(μ3-η3:η1: η2-CH2C(S)CHC(O))] ([Et4N]-[1]), (μ3-S)Fe3(CO)9(μ3- η1:η2:η1-C(H)=C(CH3)) (2), and Fe2(CO)6(μ2-η1: η2:η1-C(H)=C(CH3CH)) (3), were obtained. The novel anionic acyl cluster 1 is a CO insertion product and can be considered to display a SFe3 core bridged by an allylcarbonyl ligand, H2C=CCHC(O), in μ2-η3:η1 fashion. While cluster 2 can be seen to possess a SFe3 core coordinated with a propyne ligand, CH≡C(CH3), complex 3 exhibits a SFe2 core bridged by a α-methylvinylcarbonyl ligand, C(O)C(CH3)=CH. The anionic cluster 1 could transform to 2 and 3 upon treatment with excess propargyl bromide. When [Et4N][1] was reacted with the oxidizing agent [Cu(MeCN)4][BF4], the neutral diiron complex Fe2(CO)6(μ2- η2:η3-C(O)CHC(S)(CH3)) (4) was obtained as the major product. Complex 4 is seen to possess a SFe2 core linked by a β-methylvinylcarbonyl ligand, C(O)CH=C(CH3). More interestingly, the methylation of the acyl cluster 1 with CF3SO 3Me afforded a unique triiron cluster carbene, Fe3(CO) 9(μ3-η1:η4: η2-CH2C(S)CHC(OCH3)) (5). This paper describes a rare example of the reaction of a sulfur-capped triiron cluster with the bifunctional propargyl bromide and related reactions, in which a new series of iron-sulfur carbonyl complexes coordinated with novel organic fragments results, and the relative stability of some resultant complexes is discussed on the basis of theoretical calculations.
AB - We have synthesized a series of novel organic S-Fe-CO complexes from the reaction of the sulfur-capped triiron carbonyl cluster [SFe3(CO) 9]2- with the bifunctional propargyl bromide and subsequent reactions. When [SFe3(CO)9]2- was treated with 2 equiv of propargyl bromide in MeCN, three new organo-bridged iron-sulfur carbonyl complexes, [Et4N][Fe3(CO) 9(μ3-η3:η1: η2-CH2C(S)CHC(O))] ([Et4N]-[1]), (μ3-S)Fe3(CO)9(μ3- η1:η2:η1-C(H)=C(CH3)) (2), and Fe2(CO)6(μ2-η1: η2:η1-C(H)=C(CH3CH)) (3), were obtained. The novel anionic acyl cluster 1 is a CO insertion product and can be considered to display a SFe3 core bridged by an allylcarbonyl ligand, H2C=CCHC(O), in μ2-η3:η1 fashion. While cluster 2 can be seen to possess a SFe3 core coordinated with a propyne ligand, CH≡C(CH3), complex 3 exhibits a SFe2 core bridged by a α-methylvinylcarbonyl ligand, C(O)C(CH3)=CH. The anionic cluster 1 could transform to 2 and 3 upon treatment with excess propargyl bromide. When [Et4N][1] was reacted with the oxidizing agent [Cu(MeCN)4][BF4], the neutral diiron complex Fe2(CO)6(μ2- η2:η3-C(O)CHC(S)(CH3)) (4) was obtained as the major product. Complex 4 is seen to possess a SFe2 core linked by a β-methylvinylcarbonyl ligand, C(O)CH=C(CH3). More interestingly, the methylation of the acyl cluster 1 with CF3SO 3Me afforded a unique triiron cluster carbene, Fe3(CO) 9(μ3-η1:η4: η2-CH2C(S)CHC(OCH3)) (5). This paper describes a rare example of the reaction of a sulfur-capped triiron cluster with the bifunctional propargyl bromide and related reactions, in which a new series of iron-sulfur carbonyl complexes coordinated with novel organic fragments results, and the relative stability of some resultant complexes is discussed on the basis of theoretical calculations.
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UR - http://www.scopus.com/inward/citedby.url?scp=30344459693&partnerID=8YFLogxK
U2 - 10.1021/om050694q
DO - 10.1021/om050694q
M3 - Article
VL - 25
SP - 184
EP - 190
JO - Organometallics
JF - Organometallics
SN - 0276-7333
IS - 1
ER -