He Kupu Whakataki ki ngā Isomera Damascenone
Ko te Damascenone me te β-Damascenone he isomers nui e rua o te matū kotahi, e whakamahia whānuitia ana i roto i te umanga kakara me te reka. Ahakoa he rite te tātai ngota (C₁₃H₁₈O) o rāua, ko ō rāua hanganga matū rerekē ka hua ake he rerekētanga nui i roto i ngā kōtaha kakara me ngā whakamahinga. Ka whakaratohia e tēnei tuhinga he whakataurite taipitopito o ēnei matū kakara e rua.
Ngā Rerekētanga Hanganga Matū
Ko te rerekētanga matua i waenga i te Damascenone (ko te α-Damascenone te tikanga) me te β-Damascenone kei roto i ō rāua hanganga ngota:
·α-Damascenone: E mōhiotia ana i roto i te matū ko (E)-1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-buten-1-one, me te hononga takirua kei te tūranga-α (waro tuarua) o te mowhiti cyclohexene
·β-Damascenone: Te hanganga (E)-1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one, me ngā hononga takirua i ngā tūranga β (ngā waro tuatahi me tuatoru) o te mowhiti cyclohexadiene
·Stereochemistry: Kei te noho ngā mea e rua hei (E) isomers (whakawhiti-whiringa), e pā nui ana ki ō rātou āhuatanga kakara
Te Whakataurite i ngā Āhuatanga Ā-tinana
| Taonga | α-Damascenone | β-Damascenone |
| Kiato | 0.942 karamu/cm³ | 0.926 karamu/cm³ |
| Te Pūtake Kohua | 275.6°C | 275.6°C |
| Taupū Whakaata | 1.5123 | 1.49 |
| Āhua | Wai kore tae ki te kōwhai mā | Wai kore tae ki te kōwhai mā |
| Te wairewatanga | Kāore e rewa i te wai, e rewa ana i roto i ngā whakarewa waro | Kāore e rewa i te wai, e rewa ana i roto i ngā whakarewa waro |
| Pūwāhi Ngaro | >100°C | 111°C |
Ngā Rerekētanga o te Kōtaha Kakara
Ngā Āhuatanga o te Kakara o te α-Damascenone
·Tuhipoka Matua: Reka hua, kakariki, putiputi
·Ngā Tuhipoka Tuarua: Ngā kakara o te rākau me te hua
·Te Whakaaro Whānui: He uaua ake, he hou, he rite ki te tipu
Ngā Āhuatanga Kakara o te β-Damascenone
·Tuhipoka Matua: He āhua putiputi kaha, he rite ki te rōhi
·Ngā Tuhipoka Tuarua: Ngā kakara paramu, karepe, rāhipere, me ngā kakara rite ki te tī
·Te Whakaaro Whānui: He kaha ake, he mahana ake, he pai ake te horapa me te roa o te wā
Ngā Rerekētanga Taupānga
Ngā Whakamahinga Matua o te α-Damascenone
Te hinu kakara kounga teitei: Ka tāpiri i te uaua me te hohonu ki ngā hanganga kakara
Whakareka kai: Kua whakaaetia hei tāpiringa kai (GB 2760-96)
Te kakara tupeka: Ka whakarei ake i te maeneene o ngā hua tupeka
Ngā Whakamahinga Matua o te β-Damascenone
Te umanga hinu kakara: Te wāhanga matua o ngā kakara rōhi i roto i ngā kakara pai
Ngā tāpiringa kai: Whakamahia i roto i ngā mea reka, ngā kai tunutunu, me ngā inu
Te kakara tupeka: He wāhanga matua o te maha o ngā kakara tupeka
Ngā hua tī: He matū kakara motuhake i roto i ngā tī pango kakara honi
Te Tūnga Taiao me te Hiranga Tauhokohoko
Ngā Pūtake Taiao: Ka puta noa ēnei i roto i te hinu rōhi, te tī pango, me te hinu rāhipere
Te Hiranga Tauhokohoko: Ko te β-Damascenone te mea nui rawa atu i te mākete nā ōna āhuatanga kakara pai rawa atu
Rerekētanga Kukū: Ko te β-isomer kei roto i ngā kukū teitei ake i roto i ngā hua taiao
Te Hanga me te Whakaputa
·Ngā Tikanga Hanga: Ka taea te whakaputa i ngā mea e rua mā te tauhohenga Grignard o te β-cyclocitral, ā, ka whai muri ko te waikura
··Tukanga Whakaputa: He uaua ake, he utu nui ake hoki te hanga α-Damascenone
·Te Wātea o te Mākete: He whānui ake te wātea o te β-Damascenone, ā, he iti ake te utu
Whakamutunga
Ahakoa he rite ngā hanganga matū o te α-Damascenone me te β-Damascenone, ko te tūranga o ō rāua hononga takirua ka hua ake he āhua kakara me ngā whakamahinga motuhake. Ko te β-Damascenone, me tōna āhua putiputi rōhi me te horapa pai ake, he mea nui ake i te arumoni. Heoi, ko te āhua kakara matatini o te α-Damascenone e mau tonu ana tōna uara i roto i ētahi whakamahinga teitei. Mā te mārama ki ēnei rerekētanga ka taea e ngā kaihanga kakara me ngā kaiwhakaranu te whakamahi pai i ia isomer i roto i ā rātou hanganga.
Wā tuku: Whiringa-ā-rangi 10-2025