74975-72-7

Basic information

• Product Name: 9-(2',4',6'-trimethoxybenzylidene)anthrone
• Synonyms: 9-(2',4',6'-trimethoxybenzylidene)anthrone
• CAS NO: 74975-72-7
• Molecular Weight: 372.42
• Mol File: 74975-72-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 9-(2',4',6'-trimethoxybenzylidene)anthrone(CAS DataBase Reference)
• NIST Chemistry Reference: 9-(2',4',6'-trimethoxybenzylidene)anthrone(74975-72-7)
• EPA Substance Registry System: 9-(2',4',6'-trimethoxybenzylidene)anthrone(74975-72-7)

Safety Data

• Hazardous Substances Data: 74975-72-7(Hazardous Substances Data)

Upstream product

• 90-44-8 anthracen-9(10H)-one 
• 830-79-5 2,4,6-trimethoxybenzaldehyde 

Downstream Products

• 74975-73-8 9-(3'-bromo-2',4',6'-trimethoxybenzylidene)anthrone 

Relevant articles and documents

Vinylic Cations from Solvolysis. 29. Solvolysis of 9-(α-Bromoarylidene)anthrones as a Probe to the Reactivity - Selectivity Relationship in Solvolysis Reactions

The solvolyses of 9-(α-bromoarylidene)anthrones 5a (Ar=An), 5b (Ar=Tol), 5c (Ar=Ph), and 5d (Ar=o-An) in 1:1 AcOH-Ac2O/NaOAc and in TFE/2,6-lutidine and of 5a in buffered AcOH and 80percent EtOH were investigated.An extensive common ion rate depression by the formed or added Br- ion was observed.Selectivity constants α=kBr-/kAcO- and α'=kBr-/kTFE or kBr-/K80percentEtOH for competitive capture of the derived cations 14 by Br- vs.AcO- or the solvent were calculated.The α values in 1:1 AcOH-Ac2O, the α' values in TFE, and the reactivities (kt0 values) are structure dependent and follow the order 5a > 5d > 5b.The results for 5c are not sufficiently accurate for reliable selectivity determination.The nature of the capturing nucleophile in AcOH-containing media is discussed and evidence for product formation nearly exclusively from a solvolytically generated free vinyl cation in AcOH, AcOH-Ac2O, and TFE is given.Linear or nearly linear reactivity-selectivity relationships of log kt0 vs. log α or log α' for 5a, 5b, and 5d were obtained, but the selectivity differences are moderate in 1:1 AcOH-Ac2O and small in TFE.This behavior is discussed in relation to Ritchie's constant selectivity rule for stable cations and the linear reactivity-selectivity observed for less selective ions.It is suggested that the different selectivity relationships represent different regions of an overall nonlinear reactivity-selectivity plots for carbonium ion reactions.The merits and disadvantages of measuring selectivities by common ion rate depression are discussed.