Electron Reservoir Activity of High-Nuclearity Transition Metal Carbonyl Clusters

Rossi, Fulvio; Zanello, Piero

doi:10.4152/pea.201105309

Cited by 12 publications

(10 citation statements)

References 25 publications

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“…Hence S=4n+q=4n-74, Cp=C 1 +C 37 =C 38 C [M-6]. This means the giant cluster of 44 skeletal metal atoms, 6 will constitute an octahedral nucleus and the remaining 38 will form a capping shell which is also found to form a tetrahedral structure (Rossi and Zanello, 2011). What is also interesting is that all the 6 nuclear atoms are platinum and the shell comprises of the nickel atoms.…”

Section: Capping and De-capping Seriesmentioning

confidence: 99%

A Hypothetical Model for the Formation of Transition Metal Carbonyl Clusters Based upon 4n Series Skeletal Numbers

Kiremire¹

2016

IJC

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Skeletal numbers of elements have been introduced as derivatives of the 4n series method. They are based on the number of valence electrons present in the skeletal element. They are extremely useful in deducing possible shapes of skeletal elements in molecules or clusters especially the small to medium ones. For large skeletal clusters, the skeletal numbers may simply be regarded as identity numbers. In carbonyl clusters, they can be used as a guide to facilitate the distribution of the ligands such as CO, H and charges onto the skeletal atoms. A naked skeletal cluster may be viewed as a reservoir for skeletal linkages which get utilized when ligands or electrons get bound to it. The sum of linkages used up by the ligands bound to a skeletal fragment and the remaining cluster skeletal numbers is equal to the number of the skeletal linkages present in the original "naked parent" skeletal cluster. The skeletal numbers can be used as a quick way of testing whether or not a skeletal atom obeys the 8-or 18-electron rules.

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Section: Capping and De-capping Seriesmentioning

confidence: 99%

A Hypothetical Model for the Formation of Transition Metal Carbonyl Clusters Based upon 4n Series Skeletal Numbers

Kiremire¹

2016

IJC

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“…The valence electron content of the cluster Pd 165 (CO) 60 L 30 is 165x10+90x2 = 1860. What is fascinating is the discovery by use of series that the cluster, Ni 38 Pt 6 (CO) 48 (H) 5-, S= 4n-74; Cp = C 38 C[M-6] has an octahedral closo nuclear cluster comprising of six platinum atoms (Rossi, 2011) at the centre of a large cluster. The rhodium cluster ( Hughes and Wade, 2000) …”

Section: Capping Carbonyl Clusters Above the Ground And Undergroundmentioning

confidence: 99%

Unusual underground Capping Carbonyl Clusters of Palladium

Kiremire¹

2016

IJC

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Transition metal carbonyls form unlike boranes a wide range of clusters. High nuclearity carbonyl clusters have a tendency to form capped clusters. Using the method of series explained in this paper, many capped carbonyl clusters have been identified for group 7, 8, 9 and 10 transition metals such as rhenium, osmium, rhodium and palladium. The series have discovered that palladium form exclusively capped carbonyl clusters. Furthermore, it has been discovered that some of the capped clusters have negative nuclear closo function. Such carbonyls have been regarded as capping underground. This paper presents the unique characteristic of high nuclearity capping carbonyl clusters of palladium.Keywords: polyhedral skeletal electron pair theory, palladium capping series, underground capping clusters, clusters of high nuclearity, carbonyls of rhenium, osmium, rhodium, and palladium, hoffmann and isolobal series.

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“…Благодаря наличию обобщенной системы электронов металло-полиэдры сохраняются во многих химических и электрохимических реакциях с их участием [8,[13][14][15]. Способность кластеров давать серии обратимых одноэлектронных переходов без разрушения структуры металлоостова, как и другие свойства кластеров, зависят от их строе-ния.…”

Section: Introductionunclassified

“…Ана-лиз опубликованных данных показывает, что в кластерах с одним гетероатомом, таких как CpMnOs 3 (μ-CH=CHPh)(μ-H)(μ-CO)(CO) 11 , при редокс-превращениях происходит отрыв фраг-мента с гетерометаллом и образование гомометаллического трехъядерного кластера осмия [27]. Для кластеров с более высокой нуклеарностью наблюдаются серии обратимых одноэлек-тронных переходов [15,[31][32][33][34]. На полярограмме кластера 1 в ацетонитриле наблюдается две волны окисления .…”

Section: Introductionunclassified