The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[3.3.1.1^3,7]decane) bis(𝝁₄-oxo)-tris(𝝁₃-oxo)-nonakis(𝝁₂-oxo)-nonaaqua-decaoxo-hepta-molybdenum-di-zinc(II) dihydrate, Synthesis, and Properties

Table 2

Vibrational frequencies [cm⁻¹] and their assignment.

Compound 1	Compound 1a [38]	hmta [50, 51]	MoO	Assignment
3480.2bb	3449bb			𝜐 OH (H2O) [47]
3005.8s			2955	𝜐as CH2
2993.7s		2934		𝜐 CH
2954.3wv		2955		𝜐as CH
2822.6wv				𝜐s CH2
2785.9wv				𝜐s CH2
2705.4w				𝜐s CH2
1636.4w	1655m			δOH (H2O) [47]
1465.7w	1462s	1489		σ CH2
1450.1vw		1456		σ CH2
1374.6w	1369s	1370		τ CH2
1298.4w	1300s	1306		ω CH2
1256.5m	1253s	1269		ρ CH2
1245.9w		1240		ρ CH2
1217.9vw	1211s	1238		ρ CH2
1148.5vw		1128		δ CNC
1042.9vw		1042		δ NCN
1019.2w	1024s	1024		𝜐 NC
978.4w	979s	974.4		𝜐 NC
962.3vw			960 [39, 40]; 950 [41]; 945–970 [43–46]	Mo^5+; 𝜐 MoO; 𝜐 Mo-O-Mo
931.1m		925		𝜐 NC
896.9vs	893s		880–920 [38, 40–42]	𝜐sandas Mo=O
852.2m				𝜐 NC
831.8s		812		𝜐 NC
786.6vw		779		𝜐 NC
769.5w			740–760 [39, 42]	Mo^6+-MoO3
676.9s	671 s	673		δ NCN
664.3s		670.9		δ CNC

Vibrations symbols: vw: very weak, w: weak, m: medium strength, s: strong, vs: very strong, bb: broad band, 𝜐: stretching, δ: bending, τ: wagging, ω: twisting, ρ: rocking, σ: scissoring, s: symmetric, and as: asymmetric.