ɪn hˈaɪli bɹˈæntʃt ˈælkeɪnz, ðə bˈɑːnd ˈæŋɡəl mˈeɪ dˈɪfɚ sɪɡnˈɪfɪkəntli fɹʌmðɪ ˈɑːptɪməl vˈæljuː wˈʌnhˈʌndɹɪd nˈaɪn.fˈaɪv dᵻɡɹˈiːz tʊ ɐkˈɑːmədˌeɪt bˈʌlki ɡɹˈuːps.
In highly branched alkanes, the bond angle may differ significantly from the optimal value (109.5°) to accommodate bulky groups.