Analogies between metallaboratranes, triboronates, and boron pincer ligand complexes

Anthony F. Hill; Stephen B. Lee; James Park; Rong Shang; Anthony C. Willis

doi:10.1021/om100557q

Analogies between metallaboratranes, triboronates, and boron pincer ligand complexes

Anthony F. Hill, Stephen B. Lee, James Park, Rong Shang, Anthony C. Willis

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Abstract

The reaction of [RuRCl(CO)(PPh₃)₂] (R = C ₆H₅, CH=CHPh) with the Yamashita-Nozaki ligand C ₆H₄{N(CH₂PPh₂)}₂BH (dppBH) results in facile elimination of benzene or styrene and formation of the ruthenium [PBP]^- pincer complex [Ru{κ³B,P,P′- dppB)Cl(CO)(PPh₃)] via a stepwise sequence that recalls the formation of the ruthenaboratrane [Ru(CO)(PPh₃){B(mt)₃}] (mt = methimazolyl) from [RuRCl(CO)(PPh₃)₂] and Na[HB(mt) ₃]. This analogy is explored herein, including observations regarding notionally similar processes for triboronate ligands. Thus, while the major product of the reaction of [Ru(C₆H₅)Cl(CO)(PPh ₃)₂] with [ⁿBu₄N][B ₃H₈] is the phenylruthenatetraborane [B₃H ₈Ru(C₆H₅)(CO)(PPh₃)₂], the hydrido complex [B₃H₈RuH(CO)(PPh₃) ₂] is also obtained, consistent with alcoholic transfer hydrogenation of the putative complex [B₃H₇Ru(CO)(PPh₃) ₂].

Original language	English
Pages (from-to)	5661-5669
Number of pages	9
Journal	Organometallics
Volume	29
Issue number	21
DOIs	https://doi.org/10.1021/om100557q
Publication status	Published - 8 Nov 2010

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@article{0c56a5055d29437cb52f2e3acd506074,

title = "Analogies between metallaboratranes, triboronates, and boron pincer ligand complexes",

abstract = "The reaction of [RuRCl(CO)(PPh3)2] (R = C 6H5, CH=CHPh) with the Yamashita-Nozaki ligand C 6H4{N(CH2PPh2)}2BH (dppBH) results in facile elimination of benzene or styrene and formation of the ruthenium [PBP]- pincer complex [Ru{κ3B,P,P′- dppB)Cl(CO)(PPh3)] via a stepwise sequence that recalls the formation of the ruthenaboratrane [Ru(CO)(PPh3){B(mt)3}] (mt = methimazolyl) from [RuRCl(CO)(PPh3)2] and Na[HB(mt) 3]. This analogy is explored herein, including observations regarding notionally similar processes for triboronate ligands. Thus, while the major product of the reaction of [Ru(C6H5)Cl(CO)(PPh 3)2] with [nBu4N][B 3H8] is the phenylruthenatetraborane [B3H 8Ru(C6H5)(CO)(PPh3)2], the hydrido complex [B3H8RuH(CO)(PPh3) 2] is also obtained, consistent with alcoholic transfer hydrogenation of the putative complex [B3H7Ru(CO)(PPh3) 2].",

author = "Hill, {Anthony F.} and Lee, {Stephen B.} and James Park and Rong Shang and Willis, {Anthony C.}",

year = "2010",

month = nov,

day = "8",

doi = "10.1021/om100557q",

language = "English",

volume = "29",

pages = "5661--5669",

journal = "Organometallics",

issn = "0276-7333",

publisher = "American Chemical Society",

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T1 - Analogies between metallaboratranes, triboronates, and boron pincer ligand complexes

AU - Hill, Anthony F.

AU - Lee, Stephen B.

AU - Park, James

AU - Shang, Rong

AU - Willis, Anthony C.

PY - 2010/11/8

Y1 - 2010/11/8

N2 - The reaction of [RuRCl(CO)(PPh3)2] (R = C 6H5, CH=CHPh) with the Yamashita-Nozaki ligand C 6H4{N(CH2PPh2)}2BH (dppBH) results in facile elimination of benzene or styrene and formation of the ruthenium [PBP]- pincer complex [Ru{κ3B,P,P′- dppB)Cl(CO)(PPh3)] via a stepwise sequence that recalls the formation of the ruthenaboratrane [Ru(CO)(PPh3){B(mt)3}] (mt = methimazolyl) from [RuRCl(CO)(PPh3)2] and Na[HB(mt) 3]. This analogy is explored herein, including observations regarding notionally similar processes for triboronate ligands. Thus, while the major product of the reaction of [Ru(C6H5)Cl(CO)(PPh 3)2] with [nBu4N][B 3H8] is the phenylruthenatetraborane [B3H 8Ru(C6H5)(CO)(PPh3)2], the hydrido complex [B3H8RuH(CO)(PPh3) 2] is also obtained, consistent with alcoholic transfer hydrogenation of the putative complex [B3H7Ru(CO)(PPh3) 2].

AB - The reaction of [RuRCl(CO)(PPh3)2] (R = C 6H5, CH=CHPh) with the Yamashita-Nozaki ligand C 6H4{N(CH2PPh2)}2BH (dppBH) results in facile elimination of benzene or styrene and formation of the ruthenium [PBP]- pincer complex [Ru{κ3B,P,P′- dppB)Cl(CO)(PPh3)] via a stepwise sequence that recalls the formation of the ruthenaboratrane [Ru(CO)(PPh3){B(mt)3}] (mt = methimazolyl) from [RuRCl(CO)(PPh3)2] and Na[HB(mt) 3]. This analogy is explored herein, including observations regarding notionally similar processes for triboronate ligands. Thus, while the major product of the reaction of [Ru(C6H5)Cl(CO)(PPh 3)2] with [nBu4N][B 3H8] is the phenylruthenatetraborane [B3H 8Ru(C6H5)(CO)(PPh3)2], the hydrido complex [B3H8RuH(CO)(PPh3) 2] is also obtained, consistent with alcoholic transfer hydrogenation of the putative complex [B3H7Ru(CO)(PPh3) 2].

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U2 - 10.1021/om100557q

DO - 10.1021/om100557q

M3 - Article

SN - 0276-7333

VL - 29

SP - 5661

EP - 5669

JO - Organometallics

JF - Organometallics

IS - 21

ER -

Analogies between metallaboratranes, triboronates, and boron pincer ligand complexes

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