Topic
Tetrahedral molecular geometry
About: Tetrahedral molecular geometry is a research topic. Over the lifetime, 1795 publications have been published within this topic receiving 30706 citations.
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TL;DR: In this paper, two new Cu(I) complexes, [CuI(MBT)2]2 (1) and [cuI(BBTM)]2 (2) (BBTM = 2,2′-thiobis(benzothiazole)) were solvothermally synthesized in a one pot reaction with 2-mercaptobenzothiazoles (MBT), and a hypothetical reaction mechanism was elucidated for the formation of complexes 1 and 2.
8 citations
TL;DR: In this article, a large number of triorganodiiododophophosphorus compounds with unactivated cobalt metal in dry diethyl ether have been studied, and the reactions produce the novel ionic complexes [PR3I][Co(PR3)I3] in quantitative yield.
Abstract: The reactions of a large number of triorganodiiododophosphorus compounds, R3Pl2[R3= Et3, Prn3, Bun3, PhMe2, Ph2Me, Ph2Prn, Ph3(o-,m-or p-MeC6H4)Ph2, or (m-MeC6H4)3], with unactivated cobalt metal in dry diethyl ether have been studied. All reactions produce the novel ionic complexes [PR3I][Co(PR3)I3] in quantitative yield, illustrated crystallographically for [PPh3I][Co(PPh3)I3]. However, where R3= PhMe2 both the ionic complex and the cobalt(III) complex [Co(PPhMe2)2I3] are produced from the same reaction. The previously reported isolation of the ‘frozen transition-state complex’[Co(PBun3)3I8] from the reaction of Bun3Pl2 with cobalt powder has been reinvestigated; when allowed to proceed to completion, the reaction produces the ionic complex described above. The compound Ph3PlBr reacts with cobalt powder to produce the mixed-halide ionic complex [PR3I][Co(PR3)IBr2]. All the complexes [PR3I][Co(PR3)I3] have been studied using Raman and visible spectroscopy, the latter confirming the tetrahedral geometry of the cobalt anion. Very little reaction is observed with the corresponding dibromophosphorus compounds, R3PBr2, but in some cases visible spectroscopic studies on the trace of complex formed suggest a tetrahedral cobalt(II) species, perhaps similar to the iodo-complexes described above. Additionally, Ph3SbI2 reacts with cobalt metal in an analogous way to Ph3Pl2 to produce the novel complex [SbPh3I][Co(SbPh3)I3].
8 citations
TL;DR: In this paper, Fe(dppe)(S2CNEt2)2] was characterized analytically, spectrally, and voltammetrically, and it was shown that the Fe atom had a distorted octahedral geometry consisting of two mutually cis p-ClC6H4NC groups and two bidentate dithiocarbamato-ligands.
Abstract: Reactions of [Fe(S2CNEt2)3]+,0, [FeI(S2CNEt2)2], and [Fe(S2CNEt2)2] with Ph2PCH2CH2PPh2(dppe), CNR, and PPh3 are described. The complexes [Fe(dppe)(S2CNEt2)2]+,0, [Fe(CNR)2(S2CNEt2)2]z(z=+1, R =p-ClC6H4; z= 0, R = Pri, But, or p-ClC6H4), and [Fe{CN(p-ClC6H4)}4(S2CNEt2)]+ were characterised analytically, spectrally, and voltammetrically. Treatment of [Fe(S2,CNEt2)3]+ with PPh3 afforded [Fe(S2CNEt2)3], PPh3S, and [PPh3{C(NEt2)S}]+. An equilibrium is established, under nitrogen, between mixtures of [Fe(S2CNEt2)3] and Znl2 with [FeI(S2CNEt2)2] and [Zn(S2CNEt2)2]; in air, the first two afforded, inter alia[Znl2(Et2NCS2)2].[Fe{CN(p-ClC6H4)}2(S2CNEt2)2] reacted with Znl2 giving [Fe{CN(p-ClC6H4)}2(S2CNEt2)2Znl2]. An X-ray crystallographic examination of this compound revealed that it had crystallographically imposed C2 symmetry, the Fe atom having a distorted octahedral geometry consisting of two mutually cis p-ClC6H4NC groups and two bidentate dithiocarbamato-ligands. One sulphur atom of each S2CNEt2 group formed a bridge to the zinc atom, the distorted tetrahedral geometry of which was completed by the two iodine atoms. The relationship of this structure to the possible mechanism of ligand exchange between [Fe(S2CNEt2)3] and Znl2 is briefly discussed.
8 citations
TL;DR: In this article, a new heteroleptic mononuclear complex [Ag(mpdtc)(PPh3)2] (1) and homoleptic polymeric complex [Zn(MPdtc2]n (2) have been synthesized from potassium 4-methyl piperazine-1-carbodithioate [K(MPDtc)].
8 citations
TL;DR: In this paper, molecular orbital calculations were performed on all ionic and neutral molecular species associated with the chemistry of the Lewis acids SiFx ( x 5 1 −3) and ammonia, and the results revealed mechanistic insight into the experimentally-observed HF elimination reactions; in particular, the occurrence of H-atom transfer on a double-minimum potential-energy hypersurface.
8 citations