“Triple-Decker Sandwich” Containing Planar {B<sub>2</sub>E<sub>2</sub>Pd} Ring (E = S or Se)

Joseph, Benson; Prakash, Rini; Bag, Ranjit; Ghosh, Sundargopal

doi:10.1021/acs.inorgchem.0c02062

Cited by 9 publications

(7 citation statements)

References 80 publications

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“…All spectra of these compounds exhibited multiple bands over the range of 240–480 nm, and the absorbance of these bands increased with the increase of the concentrations of each compound. The intense absorption bands with high energy at <340 nm can be assigned to the intraligand π → π* transitions of cyclopentadienyl ligands . The lowest energy bands around 400–500 nm for 3 and 460–520 nm for 5 might arise from the 4 f -5 d transitions of the Ce 3+ ion in comparison with the spectra of the corresponding lanthanum complexes.…”

Section: Results and Discussionmentioning

confidence: 96%

Cerocene and Lanthanocene Chalcogenides: Synthesis, Structure, and Luminescence

Chen

et al. 2022

Inorg. Chem.

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A series of lanthanide chalcogenides {[η5–1,3-(Me3C)2C5H3]2Ln}2(μ-η2:η2-Te2) (Ln = Ce 1, La 2), {[η5–1,3-(Me3C)2C5H3]2Ln(THF)}2(μ-Se) (Ln = Ce 3, La 4), and {[η5–1,3-(Me3C)2C5H3]2Ln(THF)}2(μ-Te) (Ln = Ce 5, La 6) can be readily obtained by the reaction of the alkyl complexes [η5–1,3-(Me3C)2C5H3]2Ln(CH2C6H4-o-NMe2) with elemental selenium or tellurium in the presence of 9-borabicyclo[3.3.1]nonane (9-BBN). The reaction of the alkyl complexes [η5–1,3-(Me3C)2C5H3]2Ln(CH2C6H4-o-NMe2) with 9-BBN in 1:2 molar ratio afforded the lanthanide (cyclooctane-1,5-diyl)dihydroborate complexes [η5–1,3-(Me3C)2C5H3]2Ln[(μ-H)2BC8H14] (Ln = Ce 7, La 8) concomitant with the (Me2N-o-C6H4CH2)BC8H14 release, indicating that [η5–1,3-(Me3C)2C5H3]2LnH may be the reactive species for the synthesis of lanthanide chalcogenides. All the new compounds were characterized by various spectroscopic methods, and their solid-state structures were further confirmed by single-crystal X-ray diffraction analyses. Luminescence spectroscopy was also employed to characterize complexes 1–6. The Ce(III) complexes 3 and 5 display distinct luminescence properties at room temperature, as compared to the corresponding La(III) complexes 4 and 6. The complex {[η5–1,3-(Me3C)2C5H3]2Ce(THF)}2(μ-Te) (5) exhibits unexpectedly red emission in solution which is found to depend strongly on the excitation wavelength.

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Section: Results and Discussionmentioning

confidence: 96%

Cerocene and Lanthanocene Chalcogenides: Synthesis, Structure, and Luminescence

Chen

et al. 2022

Inorg. Chem.

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Section: Complexes Comprising Boron and Metal Atoms In The Middle Deckmentioning

confidence: 99%

Transition Metal Triple‐decker Sandwich Complexes Containing Group 13 Elements

Chatterjee,

Bairagi,

Ghosh

2023

Chemistry An Asian Journal

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Transition metal triple‐decker complexes are an interesting class of sandwich complexes that engrossed great attention due to their structures and properties. Over the decades, synthesis of triple‐decker complexes featuring homocyclic, heterocyclic or π‐conjugated rings as middle decks have been abundantly reported. In this regard, the chemistry of such complexes bearing boron in the middle deck are well explored due to the ability of boron‐containing cycles to readily coordinate bifacially with metal atoms thereby forming triple‐decker complexes. On the other hand, electron counting rules and theoretical calculations have strengthened our knowledge of the structure and bonding in these complexes. Further, these complexes can be used as synthons to generate organometallic polymers having interesting electronic, optical and magnetic properties that can be appropriately tuned to cater to a wide range of applications. In our quest for novel metallaboranes and metallaheteroboranes, we have been successful in isolating various triple‐decker complexes that feature boron in the middle deck. This review explained elaborately the synthesis, structures, and bonding in such complexes reported by us and others.

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“…For instance SE values of 1-O 2 -1-Li computed by the B3LYP functional with 6-31++G(d,p), 6-311++G(d,p), aug cc-p-VDZ and aug cc-p-VTZ basis sets are 96. 21 As mentioned in Section 2, in the absence of any experimental or benchmark data, MP2 and CCSD(T) calculations impart the much needed credibility on a study and serve as a gold standard. In view of this, SE of the chosen half sandwiches and sandwich complexes is further computed by MP2 calculations with 6-31++G(d,p), 6-311++G(d,p), aug cc-p-VDZ and aug cc-p-VTZ basis sets as well as the CCSD(T) method with 6-31++G(d,p) and 6-311++G(d,p) basis sets and the obtained values are listed in Table 4.…”

Section: Njc Papermentioning

confidence: 99%

“…12 Half-sandwich complexes of platinum group metals (Ir, Rh, Ru and Os) and certain recent biological and catalytic applications of these complexes have been recently reported. 20 Triple-decker sandwiches containing planar {B 2 E 2 Pd} rings ( E = S or Se) were studied by Joseph et al 21 Planar triple-decker and capped octahedral clusters of group-6 transition metals were studied by Bag et al 22 Gao et al performed a theoretical study on sandwich-like transition-metal–cyclooctatetraene clusters and one-dimensional infinite molecular wires. 23 The electronic properties of transition metal–benzene sandwich clusters have been well documented.…”

Section: Introductionmentioning

confidence: 99%