Metallheteroborane chemistry. Part 8.—NMR study of some arsena- and stibaboranes and of the rhodadiarsenaboranes [3,3-(PPh3)2-3-(H)-closo-3,1,2-RhAs2B9H9] and [3-(η5-C5Me5)-closo-3,1,2-RhAs2B9H9]

✍ Scribed by Xavier L. R. Fontaine; John D. Kennedy; Marguerite McGrath; Trevor R. Spalding

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 839 KB
• Volume: 29
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260290714

✦ Synopsis

Abstract

The cluster ^11^B and ^1^H NMR chemical shifts of the known arsenaborane species [7‐Me‐nido‐7‐AsB~10~H~12~], [7‐Me‐nido‐7‐AsB~10~H~11~]^−^, [nido‐7‐AsB~10~H~12~]^−^, [closo‐1,2‐As~2~B~10~H~10~] and [nido‐7,8‐As~2~B~9~H~10~]^−^, of the known stibaborane species [closo‐1,2‐Sb~2~B~10~H~10~] and [closo‐1,2‐CSbB~10~H~11~], and of the previously unreported metalladiarsenaboranes [3,3‐(PPh~3~)~2~‐3‐(H)‐closo‐3,1,2‐RhAs~2~B~9~H~9~] and [3‐(η^5^‐C~5~Me~5~)‐closo‐3,1,2‐RhAs~2~B~9~H~9~] were measured and assigned by [^11^B–^11^B]‐COSY, [^1^H–^1^H]‐COSY‐{^11^B}, and ^1^H–{^11^B} NMR experiments. Similarities and trends in the cluster shielding patterns were examined in order to assess changes in supposed electronic structures.