Hybrid amidinates and guanidinates of main group metals

Chlupatý, Tomáš; Růžička, Aleš

doi:10.1016/j.ccr.2015.07.012

Cited by 76 publications

(57 citation statements)

References 119 publications

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“…In summarizing the results reported here, the lithium amidinate [PhC(NiPr) 2 (7), were prepared and fully characterized. Structural characterization of the compounds revealed that ladder-like dimers are highly favored and virtually independent from the substituents around the central N-C-N fragment.…”

Section: Discussionmentioning

confidence: 98%

“…of n-butyllithium in hexanes followed by addition of 1 equiv. of iPrN=C=NiPr gave solutions of the lithium guanidinates [Et 2 NC(NiPr) 2 Li(THF)] 2 (2) In contrast, addition of C 2 H 4 NLi to the asymmetrically substituted carbodiimide EtN=C=NtBu led to dimeric [C 2 H 4 NC(NEt)(NtBu)Li(THF)] 2 (7) in 24 % isolated yield (Scheme 2b). Therefore, the composition of 7 is similar as for 1-5 (lithium:solvent ratio = 1:1).…”

Section: Introductionmentioning

confidence: 99%

“…Molecular structure of the dimeric lithium aziridylguanidate [C 2 H 4 NC(NEt)(NtBu)Li(THF)] 2(7) in the crystal. Displacement ellipsoids with 50 % probability.…”

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confidence: 99%

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Structural Investigation of New Lithium Amidinates and Guanidinates

Liebing

Harmgarth

Lorenz

et al. 2019

Zeitschrift anorg allge chemie

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A series of potentially useful lithium amidinates and guanidinates were prepared and fully characterized. Treatment of N,N′‐diisopropylcarbodiimide with phenyllithium in diethyl ether afforded the lithium amidinate [PhC(NiPr)2Li(OEt2)]2 (1). Similar treatment of N,N′‐diorganocarbodiimides R′–N=C=N–R′ [R′ = iPr, cyclohexyl (Cy)] with secondary lithium amides LiNR2 [R2 = Et2, iPr2, (CH2)4] followed by crystallization from THF or 1,4‐dioxane gave the lithium guanidinates [R2NC(NR′)2Li(S)]2 [2: R = Et, R′ = iPr, S = THF; 3: R2 = (CH2)4, R′ = iPr, S = THF; 4: R = R′ = iPr, S = ½ 1,4‐dioxane; 5: R2 = (CH2)4, R′ = Cy, S = 1,4‐dioxane] as crystalline solids. Reaction of N‐lithioaziridine with the corresponding carbodiimides afforded solvent‐deficient [{C2H4NC(NiPr2)2}2Li2(THF)]2 (6), and [C2H4NC(NEt)(NtBu)Li(THF)]2 (7). Crystal structure determination revealed the presence of common ladder‐type dimeric structures for 1–5. Compound 6 exists as a dimer of two ladder‐type dimers in the crystal, and 7 exhibits an unusual dimeric structure comprising an eight‐membered C2N4Li2 ring.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Structural Investigation of New Lithium Amidinates and Guanidinates

Liebing

Harmgarth

Lorenz

et al. 2019

Zeitschrift anorg allge chemie

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“…Alkali metal amidinates of the type R –N=C( R ′′)–N(Li)– R ′ ( R ′′ = H, aryl, alkyl) and related guanidinates ( R ′′ = amino group) are widely used substances mainly as ligand transfer reagents for the preparation of amidinates and guanidinates of transition metals and lanthanoids , . Due to the growing interest in this substance class, recent developments in main group metal amidinates and guanidinates have been summarized lately as well as also an extension to related boraamidinates …”

Section: Introductionmentioning

confidence: 99%

Hexanuclear Wheel‐Shaped Lithium N‐(2,6‐Diisopropylphenyl)‐N′‐(2‐pyridylethyl)benzamidinate

Kalden

Görls

Westerhausen

et al. 2019

Zeitschrift anorg allge chemie

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Lithiation of N-(2,6-diisopropylphenyl)-NЈ-(2-pyridylethyl)benzamidine (1) with LiN(SiMe 3 ) 2 in a solvent mixture of toluene and TMEDA yields hexameric lithium N-(2,6-diisopropylphenyl)-NЈ-(2pyridylethyl)benzamidinate (2), which can be purified by recrystalli-* Prof. Dr. M. Westerhausen 499 zation from a solvent mixture of toluene and THF. The three-coordinate lithium ions have T-shaped coordination spheres. The negative charge is delocalized within the 1,3-diazaallylic system, which adopts a (syn-Z)-arrangement.

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“…This led to a session on advances in the chemistry of molecules and materials, which ranged in scope from new synthesis and characterization methods to novel application areas. In more detail, the lectures focused on new routes for the synthesis of metal amidinate and guanidinate complexes [31], the characterization of reaction intermediates by ion spectroscopy [32] and hostguest and protein-ligand complexes by computational methods and benchmark calculations [33], and the application of such methods to study the formamide-based origin of life scenario [34]. This led to a session on environmental and catalytic technologies, which clarified the role nanotechnology can play in industrial applications and environmental remediation.…”

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confidence: 99%

US–Czech conference strengthens bilateral and multidisciplinary collaborations in nanotechnology and chemistry

DelRio

O'Regan²,

Tuček³

et al. 2018

Nanotechnology

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There are several methods to encourage bilateral and multidisciplinary collaborations-the most oft-used and effective include technical conferences, workshops, and seminars with the optimal combination of people, agenda, and length. However, this balance is difficult to attain, especially for meetings across academic disciplines and geographic borders. For nearly two decades, the US National Academies have developed a series of bilateral meetings to bring together scientists in different countries, which appear to have addressed such challenges via concise meetings with select emerging leaders from disparate fields and sectors. The authors utilized a similar approach to promote US and Czech collaborations in nanotechnology, given their mutual investments in the area and interests in building relationships. The bilateral meeting was held in Prague and designed to focus on nanotechnology and chemistry. The goals were four-fold: (1) evaluate US and Czech capabilities and challenges in nanotechnology and chemistry, (2) identify likely research projects and funding sources for collaborations, (3) celebrate 100 years of US and Czech diplomatic relations, and (4) increase government and public support for bilateral scientific research. The two-day meeting was named the US-Czech Conference on Advanced Nanotechnology and Chemistry. A summary of the research presentations, funding opportunities, panel discussions, and potential joint projects are given herein. It is our hope that this perspective will facilitate similar bilateral meetings in other fields to promote more multidisciplinary research.

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Hybrid amidinates and guanidinates of main group metals

Cited by 76 publications

References 119 publications

Structural Investigation of New Lithium Amidinates and Guanidinates

Structural Investigation of New Lithium Amidinates and Guanidinates

Hexanuclear Wheel‐Shaped Lithium N‐(2,6‐Diisopropylphenyl)‐N′‐(2‐pyridylethyl)benzamidinate

US–Czech conference strengthens bilateral and multidisciplinary collaborations in nanotechnology and chemistry

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