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The possible products include SiH 4 and/or higher molecules in the homologous series Si n H 2n+2, a polymeric silicon hydride, or a silicic acid. Hence, M II Si with their zigzag chains of Si 2− anions (containing two lone pairs of electrons on each Si anion that can accept protons) yield the polymeric hydride (SiH 2) x.
In the natural bond orbital viewpoint of 3c–4e bonding, the triiodide anion is constructed from the combination of the diiodine (I 2) σ molecular orbitals and an iodide (I −) lone pair. The I − lone pair acts as a 2-electron donor, while the I 2 σ* antibonding orbital acts as a 2-electron acceptor. [12]
n. They feature Si-Si bonds. Attracting more interest are the organic derivatives such as polydimethylsilane ((CH 3) 2 Si) n. Dodecamethylcyclohexasilane ((CH 3) 2 Si) 6 is an oligomer of such materials. Formally speaking, polysilanes also include compounds of the type (SiH 2)n, but these less studied. Carbosilanes are polymeric silanes with ...
Valence shell electron pair repulsion (VSEPR) theory (/ ˈ v ɛ s p ər, v ə ˈ s ɛ p ər / VESP-ər, [1]: 410 və-SEP-ər [2]) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. [3]
As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. However there are numerous exceptions; for example the lightest exception is chromium, which would be predicted to have the configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2 , written as [Ar] 3d 4 4s 2 , but whose actual configuration given ...
The simplest isomer of a silane is the one in which the silicon atoms are arranged in a single chain with no branches. This isomer is sometimes called the n-isomer (n for "normal", although it is not necessarily the most common). However the chain of silicon atoms may also be branched at one or more silicon atoms.
Gilbert N. Lewis introduced the concepts of both the electron pair and the covalent bond in a landmark paper he published in 1916. [1] [2] MO diagrams depicting covalent (left) and polar covalent (right) bonding in a diatomic molecule. In both cases a bond is created by the formation of an electron pair.
Trichlorosilane is produced commercially by the reaction of hydrogen chloride with silicon: . Si + 3 HCl → HSiCl 3 + H 2. Many alkoxy hydrosilanes are generated by alcoholysis of trichlorosilane.