Synthesis, characterisation and nonlinear optical properties of tetrahedral clusters Cp2Mo2ME(CO)7, (M=Fe, Ru, Os; E=S, Se)

Mathur, Purva; Ghose, Sanjukta; Hossain, Md. Munkir; Satyanarayana, C.V.V.; Chadha, Raj K.; Banerjee, Sudeep; Kumar, G. Ravindra

doi:10.1016/s0022-328x(98)00810-9

Cited by 15 publications

(3 citation statements)

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“…While compounds of type II have been already reported in the literature, this is the first time that closed triangular bimetallic clusters capped by a μ 3 -selenide unit and substituted by a phosphine ligand (type I) have been obtained and fully characterized. Another μ 3 -Se bridged Fe 2 Co complex substituted by phosphines has been reported,31a but it contains only one metal−metal bond between the two iron atoms. One possible hypothesis for the formation of clusters of type I is that the reactions proceed first with an oxidative addition of the phosphine selenide, resulting in selenium transfer to the cluster giving an intermediate species in which both the resulting phosphine ligand and the selenium are coordinated.…”

Section: Resultsmentioning

confidence: 99%

“…To our knowledge , no selenido carbonyl clusters with a mixed-metal triangular core substituted by phosphines have been reported in the literature. However, Mathur et al, Konchenko et al, as well as other research groups, have studied a series of triangular μ 3 -selenido unsubstituted clusters, along with other systems of different nuclearity . On the other hand, similar compounds containing a μ 3 -S unit and substituted by phosphines have been reported. , The NICI mass spectra for 2 and 16 show the molecular peaks along with other signals corresponding to the loss of one, two, and three carbonyl groups, respectively; the presence of ruthenium and selenium ( 2 ) and iron and selenium ( 16 ) is also indicated by the characteristic isotopic pattern.…”

Section: Resultsmentioning

confidence: 99%

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Reactivity of the Heterometallic Clusters [HMCo₃(CO)₁₂] and [Et₄N][MCo₃(CO)₁₂] (M = Fe, Ru) toward Phosphine Selenides, Including Selenium Transfer. Crystal Structures of [HRuCo₃(CO)₇(μ-CO)₃(μ-dppy)], [MCo₂(μ₃-Se)(CO)₇(μ-dppy)], and [RuCo₂(μ₃-Se)(CO)₇(μ-dppm)] [dppy = Ph₂(2-C₅H₄N)P, dppm = Ph₂PCH₂PPh<

et al. 2002

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The reactivity of [HMCo3(CO)12] and [Et4N][MCo3(CO)12] (M = Fe, Ru) toward phosphine selenides such as Ph3PSe, Ph2P(Se)CH2PPh2, Ph2(2-C5H4N)PSe, Ph2(2-C4H3S)PSe, and Ph2[(2-C5H4N)(2-C4H2S)]PSe has been studied with the aim to obtain new selenido-carbonyl bimetallic clusters. The reactions of the hydrido clusters give two main classes of products: (i) triangular clusters with a mu3-Se capping ligand of the type [MCo2(mu3-Se)(CO)(9-x)L(y)] resulting from the selenium transfer (x = y = 1, 2, with L = monodentate ligand; x = 2, 4, and y = 1, 2, with L = bidentate ligand) (M = Fe, Ru) and (ii) tetranuclear clusters of the type [HMCo3(CO)12xL(y)] obtained by simple substitution of axial, Co-bound carbonyl groups by the deselenized phosphine ligand. The crystal structures of [HRuCo3(CO)7(mu-CO)3(mu-dppy)] (1), [MCo2(mu3-Se)(CO)7(mu-dppy)] (M = Fe (16) or Ru (2)), and [RuCo2(mu3-Se)(CO)7(mu-dppm)] (12) are reported [dppy = Ph2(2-C5H4N)P, dppm = Ph2PCH2PPh2]. Clusters 2, 12, and 16 are the first examples of trinuclear bimetallic selenido clusters substituted by phosphines. Their core consists of metal triangles capped by a mu3-selenium atom with the bidentate ligand bridging two metals in equatorial positions. The core of cluster 1 consists of a RuCo3 tetrahedron, each Co-Co bond being bridged by a carbonyl group and one further bridged by a dppy ligand. The coordination of dppy in a pseudoaxial position causes the migration of the hydride ligand to the Ru(mu-H)Co edge. In contrast to the reactions of the hydrido clusters, those with the anionic clusters [MCo3(CO)12]- do not lead to Se transfer from phosphorus to the cluster but only to CO substitution by the deselenized phosphine.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Reactivity of the Heterometallic Clusters [HMCo₃(CO)₁₂] and [Et₄N][MCo₃(CO)₁₂] (M = Fe, Ru) toward Phosphine Selenides, Including Selenium Transfer. Crystal Structures of [HRuCo₃(CO)₇(μ-CO)₃(μ-dppy)], [MCo₂(μ₃-Se)(CO)₇(μ-dppy)], and [RuCo₂(μ₃-Se)(CO)₇(μ-dppm)] [dppy = Ph₂(2-C₅H₄N)P, dppm = Ph₂PCH₂PPh<

et al. 2002

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“…In the square pyramidal cluster series, [Fe 2 Co(m 3 -E)(m 3 -E%)(CO) 9 ], certain E, E% combinations have been identified for the cluster to exhibit good NLO properties [7]. Recently we have reported on the synthesis and structure of the tetrahedral cluster series [Cp 2 Mo 2 ME(CO) 7 ], (M = Fe, Ru, Os; E=S, Se), and the influence of different E ligands on the NLO properties of these clusters [8].…”

Section: Introductionmentioning

confidence: 99%