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Table 2 Characteristic IR absorptions of 4-hexylresorcinol

From: Spectroscopic determination of alkyl resorcinol concentration in hydroxyapatite composite

Wavenumber (cm−1)

Bond

Position

Reference

3340, 3419

Hydrogen bonded OH stretching

1, 2

(Kim et al. 2012)

3039

Aromatic CH stretching

3

(Kim et al. 2012)

2960

Aliphatic CH3 asymmetric stretching

4

(Coates 2000; Kim et al. 2012)

2922

Aliphatic CH2 asymmetric stretching

5

(Coates 2000; Kim et al. 2011a; Kim et al. 2012)

2873

Aliphatic CH3 symmetric stretching

6

(Coates 2000; Kim et al. 2012)

2856

Aliphatic CH2 symmetric stretching

7

(Coates 2000; Kim et al. 2011b; Kim et al. 2012)

1620, 1527

Aromatic ring C–C stretching

8, 9

(Coates 2000)

1452

Aliphatic CH2 bending

10

(Coates 2000; Krimm et al. 1956)

1435

Aliphatic CH3 asymmetric bending

11

(Coates 2000)

1398

Phenolic OH bending

12

(Coates 2000)

1377

Aliphatic CH3 symmetric bending

13

(Coates 2000; Krimm et al. 1956)

1304

Aliphatic CH2 wagging (disordered phase)

14

(Krimm et al. 1956)

1234, 1217, 1192, 1155

C–O stretching

15

(Silverstein et al. 1991; Choo et al. 2011)

1116

C–C–H bending

16

(Hallos 1984)

1095

C–C stretching

17

(Krimm et al. 1956; Frost et al. 2007)

1047

OH deformation stretching

18

(Evanoff and Chumanov 2004)

974

CH2 wagging or twisting

19

(Kozubek and Tyman 1999)

924

C–O stretching

20

(Cui et al. 2013; Gómez-Sánchez et al. 2011)

891

CH3 rocking

21

(Krimm et al. 1956)

864, 839, 800, 791, 779

Aromatic C–H out-of-plane bending

22

(Coates 2000; Silverstein et al. 1991)

725, 740

CH2 rocking

23

(Coates 2000; Krimm et al. 1956)

696

Out-of-plane ring C=C bending

24

(Silverstein et al. 1991)

617

OH out-of-plane bending

25

(Silverstein et al. 1991)