Crystal Structure of 1,2,3-Tribromoindane, C9H7Br3

Akkurt, Mehmet; Öztürk, Sema; Kendi, Engin; Tutar, Ahmet; Çakmak, Osman

doi:10.1002/1521-4079(200204)37:4<423::aid-crat423>3.0.co;2-d

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…In contrast to the situation with ethylene polymerization, where very little olefinic products were present in solution and only slight excesses of bromine were required to quench polymerizations, large excesses of bromine were required in the case of propylene polymerizations because of the presence of the vinylidene end groups arising from chain transfer. However, control experiments involving (indenyl) 2 ZrMe 2 /B(C 6 F 5 ) 3 and (indenyl) 2 ZrBr 2 showed that the indenyl groups of these compounds are very readily cleaved by excess bromine to form the tribromo species A , identified crystallographically and by NMR spectroscopy . For this reason we could not use the resonances of (indenyl) 2 ZrBr 2 as an internal standard for integrations.…”

Section: Resultsmentioning

confidence: 99%

An Investigation into the Identities and the Relative Concentrations of the Zr−Polymeryl Species Present during Ethylene and Propylene Polymerizations by Zirconocene-Based Ziegler Catalysts

2005

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A protocol is described in which zirconocene-catalyzed alkene polymerization reactions are terminated by bromine to give polymers containing brominated end groups, Br-polymeryl. Using NMR spectroscopy, the Br-polymeryl groups can be identified as primary or secondary, thus providing information concerning the nature of the Zr-polymeryl linkage(s), and (via integrations) quantified, thus giving information about the relative concentration(s) of the Zr-polymeryl linkage(s). The procedure can in principle give very useful information concerning the nature and concentrations of Zr-polymeryl groups in existence during polymerization processes and is tested through ethylene polymerization by the Cp 2ZrMe2/B(C6F5)3 catalyst system and propylene polymerization by the Cp2ZrMe2/B(C6F5)3, (indenyl)2-ZrMe2/B(C6F5)3, and rac-{C2H4(1-indenyl)2}ZrMe2/B(C6F5)3 catalyst systems. To this point the resulting data concerning Zr-polymeryl concentrations are generally consistent with data in the literature but are rather more easily obtained.

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Section: Resultsmentioning

confidence: 99%

An Investigation into the Identities and the Relative Concentrations of the Zr−Polymeryl Species Present during Ethylene and Propylene Polymerizations by Zirconocene-Based Ziegler Catalysts

2005

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Crystal structure of 1,4‐dihydroxy‐3,4‐dibromo‐1,2,3,4‐tetrahydro‐naphthalene

Öztürk¹,

Büyükkıdan

Erenler

et al. 2004

Cryst. Res. Technol.

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The title compound (C 10 H 10 O 2 Br 2 ) crystallizes in the orthorhombic space group P2 1 2 1 2 1 with a = 5.0319(2)Å, b = 13.5282(5)Å, c = 15.6289(6)Å, V = 1063.90(1)Å 3 , Z = 4, D x = 2.01 g/cm 3 at T = 293(2)K. The structure was solved by direct methods and refined by full-matrix least-squares procedures to final R = 0.078 and wR = 0.140 using 1212 observed reflections with [I ≥ 2σ(I)]. The title compound as a whole is not planar. The crystal structure is stabilized by hydrogen contacts and weak van der Waals interactions.

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Functionalisation of Indene

Tutar

Çakmak

Balcı

2006

Journal of Chemical Research

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Dibromo-and tribromoindane were synthesised by bromination of indene. Treatment of dibromo-and tribromoindane with various silver salts (silver acetate, perchlorate, sulfate and nitrate) in different solvents opened up an entry to the synthesis of various di-and tri-substituted indane derivatives. Scheme 1Br Br Br Br 1 eq. Br 2 CCl 4 , rt 1 + 2 (61%) 3 (30%) Br Br 2 3 eq. Br 2 CCl 4 , rt, quant. Br 2, CH 2 Cl 2 0 o C, 96% JOURNAL OF CHEMICAL RESEARCH 2006 AUGUST, 507-511

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Crystal Structure of 1,2,3-Tribromoindane, C9H7Br3

Cited by 3 publications

References 9 publications

An Investigation into the Identities and the Relative Concentrations of the Zr−Polymeryl Species Present during Ethylene and Propylene Polymerizations by Zirconocene-Based Ziegler Catalysts

An Investigation into the Identities and the Relative Concentrations of the Zr−Polymeryl Species Present during Ethylene and Propylene Polymerizations by Zirconocene-Based Ziegler Catalysts

Crystal structure of 1,4‐dihydroxy‐3,4‐dibromo‐1,2,3,4‐tetrahydro‐naphthalene

Functionalisation of Indene

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