Table 1 Frequencies \(\nu\) in \(\, \hbox {cm}^{-1}\) (upper rows) and integral intensities I in \(\hbox {S}\,\hbox {cm}^{-2}\) (in brackets on lower rows) of the bending and stretching vibration peaks shown in Fig. 1 of the main text.

0

n/a

n/a

1,658

n/a

3,414

(3,360)

(29,745)

1/4

1,217

1,461

1,651

2,510

3,413

(216)

(789)

(916)

(4,800)

(24,552)

1/2

1,217

1,457

1,653

2,509

3,410

(385)

(961)

(509)

(8,913)

(16,822)

3/4

1,214

1,458

1,651

2,507

3,396

(735)

(793)

(215)

(13,303)

(10,023)

1

1,213

n/a

n/a

2,506

n/a

(1,554)

(19,351)