1998
DOI: 10.1021/ja980092g
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Triply Bonded Nb24+Tetragonal Lantern Compounds:  Some Accompanied by Novel B−H···Na+Interactions

Abstract: The diniobium tetragonal lantern compound Nb2(hpp)4, 1, has been prepared in high yields by the reaction of NbCl3(DME), DME = dimethoxyethane, with a mixture of lithium naphthalenide and Li(hpp), hpp = the anion of 1,3,4,6,7,8-hexahydropyrimido[1,2-a]pyrimidine. Compound 1 interacts with two equivalents of NaEt3BH to give the bis-adduct, 1·2NaEt3BH. In a refluxing mixture of THF/toluene, 1·2NaEt3BH loses one NaEt3BH molecule to give 1·NaEt3BH. Both adducts contain short Na to N−C−N “pseudo-allylic” interaction… Show more

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Cited by 76 publications
(35 citation statements)
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References 34 publications
(50 reference statements)
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“…[23] Meanwhile, we are aware of only a single report of a four-membered Na 2 H 2 array; the mesitylene adduct {(η 6 -Me 3 C 6 H 3 )Na(µ-Et 3 BH)Na(µ-Et 3 BH)} 2 revealing a similar central metallocycle [H-Na 2.30(7) Å, 2.23(4) Å] based on pyramidalized hydride centers. [24] Scheme 4.…”
Section: Resultsmentioning
confidence: 99%
“…[23] Meanwhile, we are aware of only a single report of a four-membered Na 2 H 2 array; the mesitylene adduct {(η 6 -Me 3 C 6 H 3 )Na(µ-Et 3 BH)Na(µ-Et 3 BH)} 2 revealing a similar central metallocycle [H-Na 2.30(7) Å, 2.23(4) Å] based on pyramidalized hydride centers. [24] Scheme 4.…”
Section: Resultsmentioning
confidence: 99%
“…[1][2][3][4] The hydrogen bond is analyzed most often due to its importance in numerous chemical, physical, and biochemical processes. [2,4,6] One can mention such interactions as the hydride bond, for which the negatively charged H atom acts as the Lewis base center, and it is situated between two electropositive centers, [7][8][9][10] and the beryllium bond [11] or the dihydrogen bond, which is the contact between negatively and positively charged H atoms. [2,4,6] One can mention such interactions as the hydride bond, for which the negatively charged H atom acts as the Lewis base center, and it is situated between two electropositive centers, [7][8][9][10] and the beryllium bond [11] or the dihydrogen bond, which is the contact between negatively and positively charged H atoms.…”
Section: Introductionmentioning
confidence: 99%
“…[5] However, it was also pointed out that other noncovalent interactions play an important role in various reactions and processes. [2,4,6] One can mention such interactions as the hydride bond, for which the negatively charged H atom acts as the Lewis base center, and it is situated between two electropositive centers, [7][8][9][10] and the beryllium bond [11] or the dihydrogen bond, which is the contact between negatively and positively charged H atoms. [12] The latter interaction may be classified as a hydrogen bond from one side and also as a hydride bond from the other side.…”
Section: Introductionmentioning
confidence: 99%
“…It has also been suggested this interaction is called the ''hydride bond'' [59], because the term ''inverse'' is usually reserved for so-called blue-shift hydrogen bonds [60]. This type of interaction (BaHÁÁÁNa þ ) has been observed in an experimental crystal structure [61]. The hydride bonding in the BeH 2 ÁÁÁLi þ , BeH 2 ÁÁÁNa þ , and BeH 2 ÁÁÁMg 2þ linear complexes, and the variation-perturbation partitioning of interaction energy, have recently been investigated by use of the QTAIM [59].…”
Section: Hydride Bondsmentioning
confidence: 98%