Alkali-Metal Sandwich Complexes of a 1,2-Diaza-3,5-diborolyl Ligand Featuring η1, η2, η3, and η4 Coordination Modes

Ly, Hanh V.; Forster, Taryn D.; Corrente, Andrea M.; Eisler, Dana J.; Konu, Jari; Parvez, and Masood; Roesler, Roland

doi:10.1021/om061091x

Cited by 24 publications

(16 citation statements)

References 109 publications

(64 reference statements)

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“…The syntheses of the ligands and their alkali-metal salts (1,2-diisopropyl-3,5-dimethyl-1,2-diaza-3,5-diborolyl)lithium ( 1a ) and (1,2-diisopropyl-3,5-diphenyl-1,2-diaza-3,5-diborolyl)potassium ( 1b ) have been previously described . The reactions of these salts with the appropriate group 12 metal dihalides in THF produced the sandwich complexes 2 − 4 (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

“…The 1,2-oxa-, thia-, and azaborolidines A were obtained by the replacement of two adjacent ring carbons with boron and oxygen,9k sulfur,9g or nitrogen, 9a-c,f,h-j,l respectively, and have been coordinated to transition metals. Complexes containing the 1,3-thiaborolide ligand B have been described as well. 9d,e Some of the transition-metal complexes containing these heterocyclic ligands have been investigated as catalysts. 9e,l Continuing our investigations of boron-based heterocyclic cyclopentadienyl analogues of type C , we report herein the synthesis and structural characterization of zinc, cadmium, and mercury sandwich complexes incorporating 1,2-diaza-3,5-diborolyl ligands. A detailed structural discussion of a recently communicated zincocene from this family, 2a ,10a is also presented.…”

Section: Introductionmentioning

confidence: 99%

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Zinc, Cadmium, and Mercury Metallocenes Incorporating 1,2-Diaza-3,5-diborolyl Ligands

Forster

Parvez

et al. 2007

Organometallics

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Sandwich compounds incorporating 1,2-diaza-3,5-diborolidine ligands have been prepared by metathesis reactions between zinc, cadmium, and mercury dihalides and M[cyclo-MeC(BR)2(NiPr)2] (M = Li, K; R = Me, Ph). The metallocenes M[cyclo-MeC(BR)2(NiPr)2)]2 (M = Zn, R = Me (2a), Ph (2b); M = Cd, R = Me (3a), Ph (3b); M = Hg, R = Me (4a)) have been isolated and characterized by multinuclear NMR and mass spectrometry. The molecular structures of complexes 2a,b, 3a·BrLi(THF)3, 3b, and 4a were determined by single-crystal X-ray diffraction and displayed strong similarities to the structures of their cyclopentadienyl analogues. All molecules are monomeric in the solid state, containing nearly parallel ligands featuring an η3 coordination mode in 2a and η1 coordination modes in the remaining complexes. Spectroscopic evidence indicates that the solid-state structure is maintained in solution and that Lewis basic solvents have the ability to coordinate reversibly to the metal centers. For comparison, the σ-bonded analogues [cyclo-MeC(BR)2(NiPr)2]SiCl3 (R = Me (5a), Ph (5b)) were prepared, and the structure of 5b was determined using single-crystal X-ray diffractometry.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zinc, Cadmium, and Mercury Metallocenes Incorporating 1,2-Diaza-3,5-diborolyl Ligands

Forster

Parvez

et al. 2007

Organometallics

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“…Lithium, sodium, and potassium salts of the new ligand have been prepared and characterized. 61 It has been discovered that simple hydridoalkylzincates(II) can be prepared from mixtures of sodium and an excess of neat dialkylzinc reagent. 62 The Na and K salts of the [Zn(C 5 H 5 ) 3 ] À ion have been found to exhibit polymeric 1D and 2D structures, respectively.…”

Section: Sodiummentioning

confidence: 99%

Alkali and alkaline earth metals

Hill

2008

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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The aim of this chapter is to reflect major advances in the coordination and organometallic chemistry of the alkali and alkaline earth elements that appeared in peer-reviewed journals throughout 2007. These self-imposed limitations necessarily result in the omission of a great number of noteworthy advances in related fields rooted in either solid-state, materials or theoretical chemistry. The author apologises in advance, therefore, that not all published work can be afforded the same depth of coverage. HighlightsThe undoubted highlight of 2007 occurred toward the end of the year with the report by Jones and Stasch of the first stable magnesium(I) compounds containing a Mg-Mg bond. Other highlights include the first magnesium boryls and the continued growth of the fundamental and applied chemistry of calcium coordination complexes.

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“…The structures of sodium and potassium salts of this ligand have also been communicated. 90 Reaction of the metal salts M[cyclo-MeC(BR) 2 (N i Pr) 2 ] (M = Li Na, K; R = Me or Ph) with the group 12 salts, ZnCl 2 , CdCl 2 and HgCl 2 , results in the formation and isolation of a series of slipped metallocenes complexes with the general form M[cyclo-MeC(BR) 2 (N i Pr) 2 ] 2 . 91 The related ring system (12) made by the reaction of methyl hydrazine and with PhB(NMe 2 ) 2 has also been investigated.…”

Section: Boron Containing Heterocyclesmentioning

confidence: 99%

Boron

Johnson

2008

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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This chapter reviews the literature reported in 2007 concerning the chemistry of the boron, and focuses on those articles and publications that have appeared in 'high impact' journals. Because of the breadth of research into the area of boron chemistry, boron is again handled separate from the other elements of Group 13. The text excludes much material or technological chemistry unless original, fundamental or notable for other reasons. Due to space limitations this review is not exhaustive and the author apologises in advance that not all published work can be covered to the same extent. Boron highlightsDuring 2007 the chemistry of boryl and borylene complexes has continued to expand and remarkable progress has been made. Special mention should be made of the work of Robinson et al. in the development and synthesis of Lewis base stabilised B-B and BQB systems. Advances in the chemistry of B-N cyclic compounds have also been noteworthy over 2007 and the work of Norman et al. and Himmel et al. take centre stage in this. The standard and quality of work that exists in the boron community continues to be exceptional and long may it continue. Polyhedral boranesIn a very elegant piece of chemistry Robinson and co-workers have described the synthesis of N-heterocyclic carbene (NHC) stabilised examples of a diborane hydride (1) and the first example of a neutral diborene (2) containing a BQB bond, by reduction of NHC borane adducts, (NHC) Á BBr 3 and (NHC) Á BH 3 with KC 8 . 1 Surface scattering of a diborane matrix (10 K) has been used to generate the monobridged diboryl radical B 2 H 5 , which has been studied using IR spectroscopy to elucidate the structure. 2 The structures and energetics of cyclic boron-aluminium hydrides BAl 2 H n m (n = 3-6, m = À2 to +1) have been investigated using computational methods.

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Alkali-Metal Sandwich Complexes of a 1,2-Diaza-3,5-diborolyl Ligand Featuring η¹, η², η³, and η⁴ Coordination Modes

Cited by 24 publications

References 109 publications

Zinc, Cadmium, and Mercury Metallocenes Incorporating 1,2-Diaza-3,5-diborolyl Ligands

Zinc, Cadmium, and Mercury Metallocenes Incorporating 1,2-Diaza-3,5-diborolyl Ligands

Alkali and alkaline earth metals

Boron

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